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Recent origin of a chromosomal inversion revealed by its association with nucleotide haplotypesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
(Source: Hereditas)
Source: Hereditas - October 26, 2009 Category: Genetics & Stem Cells Authors: Pedro A. Araúz, Cinta Pegueroles, Goran Zivanovic, Pedro J. Fernández-Iriarte, Héctor Ruiz-Martín, Joan Balanyà, Lluís Serra, Francesc Mestres Source Type: journals

Cloning and phylogenetic analysis of phytoene synthase 1 (Psy1) genes in common wheat and related speciesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Cloning and phylogenetic analysis of Psy1 genes in common wheat and its relatives would help to understand the genetic diversity and evolution of Psy1 gene in common wheat and its related species. In the present study, common wheat (AABBDD) and eight relative species, including T. urartu (AuAu), T. boeoticum (AmAm), T. monococcum (AmAm), Ae. speltoides (SS), Ae. tauschii (DD), T. dicoccoides (AABB), T. dicoccum (AABB) and T. spelta (AABBDD), were sampled for the isolation of novel alleles at Psy1-A1, Psy1-B1/Psy1-S1 and Psy1-D1 loci corresponding to common wheat Psy1 genes, and 27 new alleles were identified at these loci,...
Source: Hereditas - October 26, 2009 Category: Genetics & Stem Cells Authors: Jianwu Wang, Xinyao He, Zhonghu He, Hui Wang, Xianchun Xia Source Type: journals

Isolation and characterization of polymorphic microsatellite loci in plainfin midshipman fishEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
(Source: Hereditas)
Source: Hereditas - September 10, 2009 Category: Genetics & Stem Cells Authors: Ho Young Suk, Bryan D. Neff, John L. Fitzpatrick, Sigal Balshine Source Type: journals

Old and new ideas about genes and behaviourEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Genetic factors have long been recognized as contributors to variantion in behaviour both within the normal span and as mental diseases. The first attempts to make behaviour the subject of scientific genetic studies used likeness between twins and other relatives to confirm heredity. Later heritability has been used as a quantitative estimate of the genetic part of the variance. Attempts to localize genetic factors became possible when associations between phenotypic aberrations and karyotype were observed. Inborn errors of metabolism further confirmed that specific metabolic deficits could influence behaviour. Many kinds ...
Source: Hereditas - September 9, 2009 Category: Genetics & Stem Cells Authors: Marianne Rasmuson Source Type: journals

Genomic DNA fingerprinting of indigenous chicken breeds with molecular markers designed on interspersed repeatsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In Italy more than fifty different local breeds of chicken (Gallus gallus L.) are known to have been present in the past. The overall situation is now critical since most of these breeds are becoming extinct or threatened and only a few are subject of conservation plans. The use of molecular markers for the analysis of chicken populations could help in characterizing their genetic variation and preserving them from genetic erosion. valuable and irreplaceable sources of chicken germplasm from indigenous populations of the veneto region were analyzed by means of DNA fingerprinting with molecular markers designed on intersper...
Source: Hereditas - September 8, 2009 Category: Genetics & Stem Cells Authors: M. Soattin, G. Barcaccia, C. Dalvit, M. Cassandro, G. Bittante Source Type: journals

The effect of the mus309 mutation, defective in DNA double-strand break repair, on crossing over in Drosophila melanogaster suggests a mechanism for interferenceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The mus309 gene in Drosophila melanogaster encodes a RecQ helicase which is involved in DNA double-strand break (DSB) repair. In a brood pattern analysis, it was observed that in mus309 mutant females, the frequency of single crossovers in the central cv [ndash] v interval of the X chromosome was decreased in young females but returned to the level of the wild type control as the females aged. In the proximal v [ndash] f interval, the frequency of single crossovers was increased during the whole experimental period. In particular, it was observed that the frequency of double crossovers, as well as the coefficient of coinci...
Source: Hereditas - September 1, 2009 Category: Genetics & Stem Cells Authors: Petter Portin Source Type: journals

Cytogenetic studies of three European species of Centaurea L. (Asteraceae)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Cytogenetic analysis of several populations of Centaurea jacea (2n = 4x = 44), C. oxylepis (2n = 4x = 44) and C. phrygia (2n = 2x = 22) was performed using flow cytometry, differential chromosome staining and FISH. In all species Arabidopsis-type telomeric repeats hybridized only to the terminal part of chromosomes. In C. phrygia three pairs and in C. oxylepis six pairs of chromosomes revealed the hybridization signals of 45S rDNA. Centaurea jacea showed polymorphism in the 45S rDNA loci number, five or six pairs of sites were observed. 5S rDNA loci were located in two pairs of chromosomes in C. phrygia. In C. jacea and C....
Source: Hereditas - August 26, 2009 Category: Genetics & Stem Cells Authors: Marta Dydak, Bozena Kolano, Teresa Nowak, Dorota Siwinska, Jolanta Maluszynska Source Type: journals

Micromanipulation reveals an XO-XX sex determining system in the orb-weaving spider Neoscona arabesca (Walckenaer)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Karyotypes can be difficult to create due to odd chromosome behaviors and high levels of adhesion between sex chromosomes. We have used live-cell imaging and micromanipulation to determine precisely the karyotype of the orb-weaving spider Neoscona arabesca (Walckenaer). We have found that N. arabesca has a sex determination mechanism of XO (male)-XX (female) with 2n = 20 autosomes. Staining of female tissues revealed a chromosome number of 22 in mitotic cells. (Source: Hereditas)
Source: Hereditas - August 25, 2009 Category: Genetics & Stem Cells Authors: RYAN N. DOAN, LEOCADIA V. PALIULIS Source Type: journals

Unusual intra-individual karyotypical variation and evidence of cryptic species in Amazonian populations of Pristimantis (Anura, Terrarana)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We report a cytogenetic analysis of three Pristimantis fenestratus frog populations of the Amazon region in Brazil. The specimens were sampled in Borba and Manaus, Amazonas State, and in Rio Branco, Acre State. They were analyzed using Giemsa, silver staining, C-banding and FISH with rDNA probes. The karyotypes of the three populations revealed 2n = 34 chromosomes, but they differed in the number and position of Ag-NORs and in the heterochromatin pattern as well. The NOR was located on the pairs 05 and 07 in the Rio Branco specimens, pair 10 in the Manaus specimens, and pair 1 in the Borba specimens. A small C-band was det...
Source: Hereditas - August 25, 2009 Category: Genetics & Stem Cells Authors: Sérgio Siqueira, Odair Aguiar Jr., Moisés B Souza, Albertina P Lima, Shirlei M Recco-Pimentel Source Type: journals

Chromosomal assignment of equine genes involved in the development of skeletal, gastrointestinal, cardiovascular and nervous systemEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
(Source: Hereditas)
Source: Hereditas - August 18, 2009 Category: Genetics & Stem Cells Authors: T. Ząbek, M. Bugno, J. Klukowska-Rötzler, V. Gerber, E. Słota1 Source Type: journals

Genetic analysis for some plant and fruit traits, and its implication for a breeding program of hot pepper (Capsicum annuum var. annuum L.)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The objectives were to determine the variation and effects of genes controlling inheritance of plant and fruit traits, and to propose efficient breeding procedures for improving the crop. Analysis of variance in half-diallel crosses revealed the presence of total genetic variability for seven traits among the 78 experimental entries with an excess of over-dominance genes. The presence of unequal distributions of dominant genes with positive and negative effects was observed among the parents and indicated the need to be cautious while selecting hot pepper parents for breeding purposes. Significant variability was also reve...
Source: Hereditas - August 17, 2009 Category: Genetics & Stem Cells Authors: Fekadu Marame, Lemma Desalegne, Chemeda Fininsa, Roland Sigvald Source Type: journals

Interleukin 4 receptor alpha (IL4R) and calcium-activated chloride channel 1 (CLCA1) genes map to donkey chromosomeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The results obtained in the present study enabled the physical map of the donkey genome to be extended with markers associated with recurrent airway obstruction (RAO), a major performance-limiting disease of Equidae. The equine BAC clone containing the IL4R and CLCA1 genes were localized to EAS 14q13 and EAS 6q15 respectlivy by fluorescent in situ hybridization. Identification of their locus confirmed the distribution of syntenic regions between the domestic horse and the domestic donkey within the chromosomes analysed. (Source: Hereditas)
Source: Hereditas - July 21, 2009 Category: Genetics & Stem Cells Authors: M. Bugno, E. Slota, W. Witarski, V. Gerber, J. Klukowska-Roetzler Source Type: journals

The elusive concept of the geneEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In recent years geneticists have witnessed many significant observations which have seriously shaken the traditional concept of the gene. These specifically include the facts that (1) the boundaries of transcriptional units are far from clear; in fact, whole chromosomes if not the whole genome seem to be continuums of genetic transcription, (2) many examples of gene fusion are known, (3) likewise many examples of so-called encrypted genes are known in the organelle genomes of microbial eukaryotes and in prokaryotes, and (4) in addition to the structure of the gene, its functional status can also be inheritable, and, furthe...
Source: Hereditas - July 8, 2009 Category: Genetics & Stem Cells Authors: Petter. Portin Source Type: journals

Inter simple sequence repeat (ISSR) based analysis of genetic diversity of Lobelia rhynchopetalum (Campanulaceae)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
An understanding of the patterns of genetic variation within and among populations of plant species is essential for devising optimum genetic management strategies for their conservation. Here, the inter simple sequence repeat (ISSR) technique was used to study genetic variation of the Afroalpine giant lobelia, Lobelia rhynchopetalum, based on ten populations sampled from Bale and Simen mountains in Ethiopia. The percentage of polymorphic loci across all samples (PS) and within population (Pp) was 78% and 27%, respectively. Regardless of a high total genetic variation, the species has quite low variation within populations...
Source: Hereditas - July 4, 2009 Category: Genetics & Stem Cells Authors: Mulatu Geleta, Tomas Bryngelsson Source Type: journals

The New World Artemia species A. franciscana and A. persimilis are highly differentiated for chromosome size and heterochromatin contentEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Chromosomal rearrangements have played a key role in the speciation of the New World sexual Artemia species (Crustacea, Anostraca) A. franciscana and A. persimilis. The species differ by a chromosome duplication (2n+2=44 in A. persimilis vs 2n=42 in A. franciscana), and a greater amount of heterochromatin (HCH) in A. franciscana. To investigate this difference in HCH, four parameters were compared for the first time in Artemia: 1) the absolute sizes of one A. persimilis and four A. franciscana karyotypes; 2) the relative lengths of all chromosome; 3) the number of heterochromatic bands and 4) the relative amounts of HCH pe...
Source: Hereditas - May 11, 2009 Category: Genetics & Stem Cells Authors: Margarita Parraguez, Gonzalo Gajardo, John A. Beardmore Source Type: journals

Chromosome evolution in three Brazilian Leptodactylus species (Anura, Leptodactylidae), with phylogenetic considerationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Karyotypic analyses on three species of the Leptodactylus from Brazil showed 2n=24 in L. cf. marmoratus, 2n=23 in Leptodactylus sp. (aff. bokermanni), and 2n=26 in L. hylaedactylus, with distinct numbers of bi and uni-armed chromosomes. Leptodactylus cf. marmoratus presented a variation as regard to the morphology of pair 12. All specimens of L. cf. marmoratus had Ag-NOR in pair 6, confirmed by FISH, but the sample from one of the localities presented additional Ag-NOR, in one of the chromosomes 8. In Leptodactylus sp. (aff. bokermanni) and L. hylaedactylus the chromosome pairs bearing Ag-NOR are 11 and 7, respectively. Th...
Source: Hereditas - April 30, 2009 Category: Genetics & Stem Cells Authors: João Reinaldo Cruz Campos, Fernando Ananias, Cinthia Aguirre Brasileiro, Marcos Yamamoto, Célio Fernando Baptista Haddad, Sanae Kasahara Source Type: journals

Centromeric distribution of 350-family in Dasypyrum villosum and its application to identifying Dasypyrum chromatin in the wheat genomeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Variants of the 350-family sequences were isolated from Dasypyrum villosum genomic DNA. Although the consensus sequence shared 86% homology to p380 and 84% homology to pHvNAU62 of D. villosum, a 63 bp long region including variable microsatellite repeat (TG)7-9 was found to be absent in pHvNAU62 or much different from p380. This sequence also shared 67% homology to the 350-family of rye. The representative clone pDvTU383 was localized on the D. villosum chromosomes by using the sequential C-banding and fluorescence in situ hybridization (FISH). Combining with the probes of pTa71 and pTa794 containing 18S-5.8S-28S rDNA (NOR...
Source: Hereditas - April 10, 2009 Category: Genetics & Stem Cells Authors: Wen-ye Yuan, Motonori Tomita Source Type: journals

Intron characterization and their potential as molecular markers for population studies in the scallops Aequipecten opercularis and Mimachlamys variaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Exon-primed intron-crossing PCR was used on the European commercial scallops Aequipecten opercularis and Mimachlamys varia to characterize introns of four nuclear genes and to identify DNA markers useful for population studies. The primers used yielded the expected product, except those for the lysozyme gene that failed to work in M. varia and amplified a fragment of a proteasome subunit gene (APSM) in A. opercularis. According to the sequences characterized, A. opercularis has at least four calmodulin genes, one of arginine kinase and two of [beta]-tubulin, and M. varia five, one and one, respectively. Length polymorphism...
Source: Hereditas - April 7, 2009 Category: Genetics & Stem Cells Authors: Alberto Arias, Ruth Freire, Josefina Méndez, Ana Insua Source Type: journals

The distribution and identification of brown planthopper resistance genes in riceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A collection of 515 rice landraces originating from Vietnam and China were screened for the reaction to brown planthopper (BPH) infestation. Most of the resistant landraces were indica types from Vietnam and the Guangxi province in China. An F2 mapping population was created from the cross between a BPH resistant Vietnamese landrace Yagyaw and the susceptible cultivar Cpslo17. Four quantitative trait loci (QTL) contributing to BPH resistance were mapped on chromosomes 2, 4, 7 and 9, respectively. The individual QTL accounted 5.64% to 12.77% of the phenotypic variance, and three resistant alleles were harbored in the resist...
Source: Hereditas - April 2, 2009 Category: Genetics & Stem Cells Authors: Yuqiang Liu, Changchao Su, Ling Jiang, Jun He, Han Wu, Cheng Peng, Jianmin Wan Source Type: journals

Phylogeography and mitochondrial DNA divergence in Dolichopoda cave crickets (Orthoptera, Rhahidophoridae)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study we analysed the phylogeny within the genus Dolichopoda using parts of the mitochondrial cytochrome oxidase I and 16S ribosomal genes, and explored biogeographic patterns through a dispersal[ndash]vicariance analysis (DIVA). Phylogenetic analyses grouped the 15 species into the four geographically restricted main lineages corresponding to the Caucasus, Greece, the Pyrenees and Italy, respectively. The species occur largely in allopatry. The Caucasian and Greek species were basal in the phylogeny, as was the clade including the nine Italian species, which grouped into two major lineages, one mainly including sp...
Source: Hereditas - March 30, 2009 Category: Genetics & Stem Cells Authors: Lene Martinsen, Federica Venanzetti, Lutz Bachmann Source Type: journals

Effect of geographic isolation on genetic differentiation in Dendroctonus pseudotsugae (Coleoptera: Curculionidae)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Genetic structure of phytophagous insects has been widely studied, however, relative influence of the effect of geographic isolation, the host plant or both has been subject of considerable debate. Several studies carried out on bark beetles in the genus Dendroctonus evaluated these factors; nonetheless, recent evidence has shown that genetic structuring is a more complex process. Our goal was to examine the effect of geographic isolation on genetic structure of the Douglas-fir beetle Dendroctonus pseudotsugae. We used mtDNA cytochrome oxidase I (COI) sequences and RAPD markers. One hundred-seventy-two individuals were obt...
Source: Hereditas - March 30, 2009 Category: Genetics & Stem Cells Authors: Enrico A. Ruiz, John E. Rinehart, Jane L. Hayes, Gerardo Zúñiga Source Type: journals

Detection and screening of bovine leukocyte adhesion deficiency in Pakistan using molecular methodsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Bovine leukocyte adhesion deficiency (BLAD) is an autosomal recessive disease. Affected animals die because of extreme susceptibility to infections caused by the lack of a membrane glycoprotein called the leukocyte integrin beta-2 subunit of CD18. The present study was planned to standardize a technique for the diagnosis of BLAD and to get an estimation of BLAD allele in the Pakistani cattle population. The study was performed on 700 animals including Holstein[ndash]Friesian (HF) (n=280), Friesian[ndash]Sahiwal (FS) (n=120) Sahiwal (n=100) cows and HF calves (n=59) from Government as well as private farms. Similarly 141 bu...
Source: Hereditas - March 28, 2009 Category: Genetics & Stem Cells Authors: Fozia Nasreen, Naveed Altaf Malik, Muhammad Naeem Riaz, Javed Anver Qureshi Source Type: journals

Overexpression of grappa encoding a histone methyltransferase enhances stress resistance in DrosophilaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Histone deacetylases, such as silent information regulator 2 (Sir2) and Rpd3 are involved in chromatin silencing and implicated in lifespan determination in several organisms. The yeast Dot1 gene encoding a histone methyltransferase affects localization of silencing proteins including Sir2, and plays an essential role in the repair of damaged DNA. However, it is not known whether an alteration of a histone methyltransferase activity influences lifespan or stress resistance, which is often associated with extended lifespan. Here we investigated whether the Drosophilagrappa (gpp) gene, a Dot1 homolog influences lifespan and ...
Source: Hereditas - February 26, 2009 Category: Genetics & Stem Cells Authors: Olivier List, Toru Togawa, Manabu Tsuda, Takashi Matsuo, Loic Elard, Toshiro Aigaki Source Type: journals

Differential expression of the Enhancer of split genes in the developing Drosophila midgutEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The Notch signaling pathway plays an important role during development in animals from worms to humans and pathway components are required for the differentiation of many different cell types. In Drosophila, Su(H) dependent Notch activation up-regulates transcription of the Enhancer of split-Complex (E(spl)-C). The E(spl) genes are known to function during neurogenesis, although expression and genetics studies suggest that they also play roles in the development of other tissues. The majority of the E(spl) genes contain upstream binding sites for Su(H), proneural proteins, and E(spl) bHLH proteins resulting in overlapping ...
Source: Hereditas - February 5, 2009 Category: Genetics & Stem Cells Authors: Morgan L. Maeder, Colleen Megley , Deborah A. Eastman Source Type: journals

Successful cross-amplification of Shorea microsatellites reveals genetic variation in the tropical tree, Shorea robusta GaertnEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Sal (Shorea robusta) is a tree species with very good quality timber found across tropical south Asia. Due to over-exploitation, its genetic resources are highly depleted. Here we report for the first time on molecular markers in sal. Cross-species amplification of 27 Shorea microsatellites resulted in 24 of them harboring amplicons of expected sizes. Five microsatellites were moderate to highly polymorphic (Na=6[ndash]19). Observed and expected heterozygosities ranged from 0.49 to 0.77 and 0.52 to 0.89, respectively. These microsatellites are found to be adaptively neutral and are useful for population genetic studies in ...
Source: Hereditas - February 4, 2009 Category: Genetics & Stem Cells Authors: Madhav Pandey, Thomas Geburek Source Type: journals

EST-SSR diversity correlated with ecological and genetic factors of wild emmer wheat in IsraelEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The differentiation of genetic diversity was estimated among 15 wild emmer wheat (Triticum dicoccoides) populations of the macrogeographic scale in Israel by 25 EST-SSR markers. A total of 92 EST-SSR alleles were detected, and the number of alleles ranged from 1 to 7 with an average of 3.68 per locus. Allele numbers and the polymorphic information content (PIC) value of EST-SSR loci on the B genome were higher than those on the A genome. The genetic similarity coefficient (GS) varied from 0.189 to 0.966, and all genotypes were clustered into four major groups. The population Mt. Gerizim had the highest genetic variations, ...
Source: Hereditas - January 14, 2009 Category: Genetics & Stem Cells Authors: Pan Dong, Yu-Ming Wei, Guo-Yue Chen, Wei Li, Ji-Rui Wang, Eviatar Nevo, You-Liang Zheng Source Type: journals

Association of extracellular superoxide dismutase gene with cerebral infarction in women: a haplotype-based case-control studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
It has been reported that oxidative stress is a factor in cerebral infarction (CI). Extracellular superoxide dismutase (EC-SOD) is important in preventing oxidative stress, and the cerebral infarct size of EC-SOD knockout mice is significantly larger than that in wild-type controls. The aim of this study was to investigate the relationship between CI and the human EC-SOD gene using single-nucleotide polymorphism (SNP) in Japanese individuals. We selected five single-nucleotide polymorphisms of the human EC-SOD gene (rs13306703, rs699473, rs17881426, rs2536512 and rs1799895) and performed a case-control study using each SNP...
Source: Hereditas - December 24, 2008 Category: Genetics & Stem Cells Authors: Takahiro Naganuma, Tomohiro Nakayama, Naoyuki Sato, Zhenyan Fu, Masayoshi Soma, Noriko Aoi, Shigeaki Hinohara, Nobutaka Doba, Ron Usami Source Type: journals

Molecular characterization, expression profile and polymorphisms of the porcine TNNC2 geneEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, we characterized the full-length cDNA of the porcine TNNC2 gene, which is composed of a 65 bp 5'UTR, a 483 bp (ORF) and a 174 bp 3' UTR. Northern blot analysis indicated that the TNNC2 gene had one transcript of approximately 0.7 kb and was expressed exclusively in skeletal muscle (triceps brachii, biceps femoris and longissimus dorsi). SDS-PAGE and Western blotting analysis indicated that the porcine TNNC2 protein comprised 160 amino acids, and had a molecular mass of 18 kDa. The porcine TNNC2 gene, which spans 3.2 kb, was isolated and was found to be composed of six exons. All exon/intron boundaries adhere...
Source: Hereditas - December 9, 2008 Category: Genetics & Stem Cells Authors: Yanfang Li, Yaosheng Chen, Jiaqi Li, Chong Wang, Xiaohong Liu, Hao Zhang, Yingjie Mei, Fei Ling, Shixin Li, Songling Chen, Wanfu Zhong Source Type: journals

Dispersal in Mastomys natalensis mice: use of fine-scale genetic analyses for pest managementEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, population genetic techniques were used to gain new insights into its dispersal behaviour, a critical parameter in pest management. Using 11 microsatellites, 272 individuals from a 300 ha area in Tanzania were genotyped. Genetic diversity was high, with no isolation by distance and little differentiation between field plots far apart, indicating a large effective population size and high dispersal rates in agreement with ecological observations. On the other hand, genetic differentiation between nearby field plots, isolation by distance within a single field plot and kin clustering were also observed. This a...
Source: Hereditas - December 8, 2008 Category: Genetics & Stem Cells Authors: Pim van Hooft, J. F. Cosson, S. Vibe-Petersen, H. Leirs Source Type: journals

Extent of linkage disequilibrium in wild and domestic chicken populationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Linkage disequilibrium (LD) analyses play a fundamental role in gene mapping, both as a tool for fine mapping of complex trait gene and in genome-wide association studies. The use of LD analyses in practice depends crucially on the understanding of the patterns of LD in the genome. In the present study, a total of 36 SNP were selected initially in a region (200 kb) of Contig.060226.1 on GGA1 based on the average physical distance. After verifying their level of polymorphism, 21 SNP were selected finally to genotype one wild and two domestic chicken populations, Red Jungle Fowl (RJF), Taihe Silkie chicken (TS) and White Rec...
Source: Hereditas - November 1, 2008 Category: Genetics & Stem Cells Authors: You Sheng Rao, Yong Liang, Meng Na Xia, Xu Shen, Ying Jun Du, Chen Glong Luo, Qing Hua Nie, Xi Quan Zhang Source Type: journals

Characterization of novel LMW-GS genes at Glu-D3 locus on chromosome 1D in Aegilops tauschiiEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The objectives of this study were to clarify the relationship between LMW-GS Glu-D3 gene of Ae. tauschii registered in GenBank and the six Glu-D3 genes including 12 allelic variants of common wheat characterized in our previous studies, and identify novel Glu-D3 genes and haplotypes from Ae. tauschii using gene specific PCR amplification. By searching the NCBI database, 13 LMW-GS genes/pseudogenes of Ae. tauschii were retrieved and classified into five gene families based on their nucleotide similarity with the six Glu-D3 genes of common wheat. Of them, four Ae. tauschii genes, AY585350, AY585354, AY585355 and AY585356 mat...
Source: Hereditas - October 28, 2008 Category: Genetics & Stem Cells Authors: Xianlin Zhao, Yan Yang, Zhonghu He, Zhensheng Lei, Wujun Ma, Qixin Sun, Xianchun Xia Source Type: journals

A UCP1-412A>C polymorphism is associated with abdominal fat area in Korean womenEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study is the first to associate this polymorphism with a human phenotype. The frequency of the major A allele was 0.53 and that of the minor C allele was 0.47. The -412A>C polymorphism was not linked to the well-known -3826A>G (rs1800592; ∣D'∣=0.60 and r2=0.33), yielding four predicted haplotypes from these two polymorphisms. We associated -412A>C, -3826A>G and their haplotypes with computed tomography-measured body fat areas from 367 Korean female subjects. The G allele of -3826A>G and the C allele of -412A>C were significantly associated with larger areas of abdominal subcutaneous fat in a dominant mod...
Source: Hereditas - October 27, 2008 Category: Genetics & Stem Cells Authors: Min Ho Cha, Kil Soo Kim, Dongchul Suh, Sang-In Chung, Yoosik Yoon Source Type: journals

Heterofertilization of the opaque-2 endosperm in maizeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The objective of this work was to investigate the frequency of heterofertilization of opaque-2 (o2) kernels in maize. Three BC1F1 populations using o2 lines as recurrent parents and some BC1F2 progenies were used to investigate endosperm phenotypes and plant genotypes. The plant genotypes were determined using simple sequence repeat (SSR) markers, phi057 or phi112, which are sequences located within the Opaque-2 (O2) gene; the endosperm phenotypes were observed visually. In the BC1F1 populations, the frequency of heterofertilization was 0[sim]4.545%. This result indicates that there may be up to a 5% difference between the...
Source: Hereditas - October 22, 2008 Category: Genetics & Stem Cells Authors: Wenpeng Yang, Yonglian Zheng, Jing Wu Source Type: journals

Chromosomal assignment of the ovine hairless (hr) gene by fluorescence insitu hybridizationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
(Source: Hereditas)
Source: Hereditas - October 11, 2008 Category: Genetics & Stem Cells Authors: Raffaella Finocchiaro, Bianca Castiglioni, Elena Budelli, Johannes B.C.H.M. van Kaam, Baldassare Portolano, Anna Caroli, Giulio Pagnacco Source Type: journals

Heritability and gene effects for yield and yield components in chickpeaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A 4×4 full-diallel cross set of chickpea (ILC 3279, Konya, Balikesir and Aknohut) was studied to estimate the gene effects and genetic parameters of nine traits. According to Hayman's method, only additive gene effects were found significant for days to flowering, plant height, number of pods and seeds per plant. In additon to the significant additive gene effects, dominant gene effects were significant for days to maturity, basal pod height, number of branches per plant and 100-seed weight. However, the magnitude of the additive gene effects was much higher than dominant gene effects. Reciprocal differences were observed...
Source: Hereditas - September 30, 2008 Category: Genetics & Stem Cells Authors: B. Tuba BİÇer, Doğan Şakar Source Type: journals

Meiotic analysis of Danish species of Barbarea (Brassicaceae) using FISH: chromosome numbers and rDNA sitesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
PMCs of 5 taxa of Barbarea from Denmark, i.e. B. stricta, B. verna, B. intermedia and B. vulgaris ssp. vulgaris and ssp. arcuata, the latter including the two morphologically, biochemically and cytologically divergent P-(pubescent) and G-(glabrous) types, and two P-×G-type hybrids were subjected to meiotic analysis for numbers of chromosomes and rDNA sites using fluorescent in situ hybridization (FISH). Meiosis was very regular. The chromosome number of all material was n=x=8 in agreement with the general chromosome number of 2n=16 of the genus. A previously suggested chromosome number of 2n=18 of Danish accessions of the...
Source: Hereditas - September 18, 2008 Category: Genetics & Stem Cells Authors: Marian Ørgaard, Ib Linde-Laursen Source Type: journals

Molecular characterisation of indigenous Swedish apple cultivars based on SSR and S-allele analysisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Trees of 68 apple cultivars, aimed for preservation by the 'National Program for diversity of cultivated plants' as mandate cultivars, were analysed using a set of 10 SSR (simple sequence repeat) primer pairs and the self-incompatibility (S[minus])locus to evaluate genetic diversity and reveal inter-cultivar relationships. The 12 polymorphic SSR loci exhibited 2 to 15 alleles, with expected heterozygozity (He) ranging from 0.36 to 0.88 and a mean of 0.74. Numerous alleles were classified as rare or unique (35% and 18% respectively). For the S-locus, a total of 14 alleles were identified in this study. Five alleles, S1[ndas...
Source: Hereditas - September 16, 2008 Category: Genetics & Stem Cells Authors: L. Garkava-Gustavsson, A. Kolodinska Brantestam, J. Sehic, H. Nybom Source Type: journals

Molecular characterization of LMW prolamines from Crithopsis delileana and the comparative analysis with those from TriticeaeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Using the homologous primers designed from known sequences of low-molecular-weight glutenin subunits (LMW-GS), four LMW prolamine gene sequences, designated as LMW-GSK1 (EU283813), LMW-GSK2 (EU283814), LMW-GSK3 (EU283815) and LMW-GSK4 (EU283816), were isolated from wheat-related diploid species Crithopsis delileana, among which LMW-GSK3 and LMW-GSK4 were partial gene sequences. These LMW prolamine gene sequences from C. delileana had the similar typical primary structures to the known LMW glutenin subunit genes in wheat and its related species. The 5' flanking region of the LMW-GSK1 contained two cis-elements EM (5'-TGTAAA...
Source: Hereditas - August 27, 2008 Category: Stem Cells Authors: Zhi-Fu Guo, Pan Dong, Xiang-Yu Long, Yu-Ming Wei, Li-Jun Zhang, You-Liang Zheng Source Type: journals

Molecular diversity and relationships among elite maize inbreds from US and CIMMYT populations and current heterotic groups in ChinaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study was performed to assess genetic diversity and genetic distance among representative inbreds from known heterotic groups in China and broadly based American populations. A total of 36 maize inbreds, 18 each from America and China, were evaluated at 109 simple sequence repeat (SSR) loci. SSR data revealed greater genetic diversity with an overall mean polymorphic information content (PIC) of 0.66 and mean number of 6 alleles per locus. Among the alleles, 25.5 and 19.8% were inbred-specific to Chinese and American inbreds, respectively. The inbreds were clustered into five groups, Reid Yellow Dent (RYD), Iowa Corn ...
Source: Hereditas - August 26, 2008 Category: Stem Cells Authors: Da-Hao Zheng, Kyujung Van, Suk-Ha Lee Source Type: journals

QTL mapping for yield components in a tropical maize population using microsatellite markersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The objective of this study was to map QTL related to several agronomic important traits associated with grain yield: ear weight (EW), prolificacy (PROL), ear number (NE), ear length (EL) and diameter (ED), number of rows on the ear (NRE) and number of kernels per row on the ear (NKPR). Four hundred F2:3 tropical maize progenies were evaluated in five environments in Piracicaba, Sao Paulo, Brazil. The genetic map was previously estimated and had 117 microssatelite loci with average distance of 14 cM. Data was analysed using Composite Interval Mapping for each trait. Thirty six QTL were mapped and related to the expression ...
Source: Hereditas - August 26, 2008 Category: Stem Cells Authors: Priscilla Karen Sabadin, Cláudio Lopes de Souza Júnior, Anete Pereira de Souza, Antonio Augusto Franco Garcia Source Type: journals

Evaluation of genetic diversity in wild orchardgrass (Dactylis glomerata L.) based on AFLP markersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Orchardgrass (Dactylis glomerata L.) is a highly variable perennial forage grass, widely cultivated in all temperate and subtropical growing regions of the world. Despite its economic importance, there is a lack of information on the genetic diversity within and among populations. In order to assess DNA molecular genetic variations and formulate appropriate strategies for conservation and utilization of wild orchardgrass genetic resources available in China, mainly amplified fragment length polymorphism (AFLP) DNA profiling method was used to detect the genetic diversity and relatedness among 32 wild orchardgrass accession...
Source: Hereditas - August 14, 2008 Category: Stem Cells Authors: Yan Peng, Xinquan Zhang, Yulin Deng, Xiao Ma Source Type: journals

Clustering of QTL conferring SCMV resistance in tropical maizeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, we mapped and characterized quantitative trait loci (QTL) associated with resistance to SCMV in a maize population consisting of 150 F2:3 families from the cross between two tropical maize inbred lines, L520 (resistant) and L19 (susceptible). F2 individuals were genotyped with microsatellite (SSR) markers, and the derived F2:3 families were evaluated for their response to artificial inoculation with SCMV under field conditions at Sete Lagoas, MG, Brazil, in 2001 and 2005. Multiple interval mapping was used for QTL detection with a linkage map based on 19 SSR markers. Three QTLs for SCMV resistance were ident...
Source: Hereditas - July 25, 2008 Category: Stem Cells Authors: Isabel Regina Prazeres De Souza, Adilson Ricken Schuelter, Claudia Teixeira Guimarães, Ivan Schuster, Elizabeth De Oliveira, Margaret Redinbaugh Source Type: journals

Analysis of the dermatoglyphics in Turkish patients with Klinefelter's syndromeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The word "dermatoglyphics" indicates study of epidermal ridge configuration on palms, soles and fingertips. This investigation was aimed to analyze dermatoglyphic patterns in Klinefelter's syndrome (KS) patients. The study cohort consisted of 57 cases and 25 controls. The prints were taken by using the ink method. Fingertip patterns, triradial counts, a-t-d angle and a-b ridge count were studied. There were significant differences in radial loops and whorls (p (Source: Hereditas)
Source: Hereditas - July 22, 2008 Category: Stem Cells Authors: F. Sirri Cam, Davut Gul, Yusuf Tunca, Tevhide Fistik, Mujgan Ozdemir Erdogan, Handan Yildiz, Solmaz Erdem, Mustafa Solak Source Type: journals

Inheritance and effects of the photoperiod sensitivity in foxtail millet (Setaria italica P. Beauv)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Photoperiod-sensitive male sterility is a useful tool for exploitation of the heterosis in foxtail millet (Setaria italica P. Beauv), especially of the inter-specific cross using a two-line system. A foxtail millet photoperiod-sensitive male sterile line JG1S was identified in our hybrid breeding program which exhibited complete sterility under natural long daylight conditions (14.5 h d[minus]1) and partial fertility under short daylight conditions (10 h d[minus]1). The genetic basis of photoperiod-sensitive male sterility in JG1S was studied using nine F1×F2 and BCF1 progeny populations descended from crosses between JG1...
Source: Hereditas - July 21, 2008 Category: Stem Cells Authors: Ai-Ping Yuan, Ai-Bin Hou, Fu-Yao Zhang, Yang-Dong Guo Source Type: journals

Molecular variation in the Odh gene in Chilean natural populations of Drosophila subobscuraEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A 793-nucleotide fragment from the D. subobscuraOdh gene was sequenced in 46 lethal chromosomal lines from two South American colonizing populations (18 from Santiago de Chile and 28 from Puerto Montt). Only eight different haplotypes were found and, with just one exception, all had previously been detected in North American samples. The exception probably corresponds to a genetic exchange between two American haplotypes. Our results confirm the loss in genetic variability due to the recent founder event, and the high resemblance between the two colonized hemispheres. One haplotype is entirely associated with the O5 invers...
Source: Hereditas - July 21, 2008 Category: Stem Cells Authors: Laia Gómez-Baldó, Amparo Latorre, Luís Serra, Francesc Mestres Source Type: journals

Deviation from apomictic reproduction in Dendrobaena octaedra?Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
(Source: Hereditas)
Source: Hereditas - July 13, 2008 Category: Stem Cells Authors: Vibeke Simonsen , Martin Holmstrup Source Type: journals

Regulation of Abd-B expression by Cyclin G and Corto in the abdominal epithelium of DrosophilaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Hereditas, Volume 0, Issue 0, Page ???, OnlineEarly Articles. Polycomb-group (PcG) and trithorax-group (trxG) genes encode important regulators of homeotic genes, repressors and activators, respectively. They act through epigenetic mechanisms that maintain chromatin structure. The corto gene of Drosophila ... (Source: Hereditas)
Source: Hereditas - May 29, 2008 Category: Stem Cells Tags: article Source Type: journals

Evolution of man in the light of molecular genetics: a review. Part II. Regulation of gene function, evolution of speech and of brainsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Hereditas, Volume 0, Issue 0, Page ???, OnlineEarly Articles. In the first part of this review the evolutionary history and genomics of the human species were considered in the light of molecular genetic evidence. In this second part the emphasis will be put on the regulation of the function of the genes and ... (Source: Hereditas)
Source: Hereditas - May 27, 2008 Category: Stem Cells Tags: article Source Type: journals

Genetic diversity among Turkish local grape accessions (Vitis vinifera L.) using RAPD markersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Hereditas, Volume 145, Issue 2, Page 58-63, April 2008. To estimate genetic relationships among 46 local grape cultivars, RAPD analysis was performed with 25 decamer primers selected from a total of 60 primers. Genetic relationships among these cultivars were determined by calculating similarity indexes, from ... (Source: Hereditas)
Source: Hereditas - May 27, 2008 Category: Stem Cells Tags: article Source Type: journals

Caryological study on four Hesperis L. (Cruciferae) taxa from the Diaplictos (Dvořák) Dvořák section in TurkeyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study examined chromosome numbers and karyotypes of four taxa, Hesperis novakii Dvořák, H. bottae Fourn., H. balansae Fourn. and H. syriaca (DC.) Dvořák, from naturally growing Diaplictos (Dvořák) Dvořák section, which is represented by only these ... (Source: Hereditas)
Source: Hereditas - May 27, 2008 Category: Stem Cells Tags: article Source Type: journals