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GrainGenes Reference Report: TAG-103-415

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Reference	TAG-103-415
Title	Molecular mapping of the Oregon Wolfe Barleys: a phenotypically polymorphic doubled-haploid population
Journal	Theoretical and Applied Genetics
Year	2001
Volume	103
Pages	415-424
Author	Costa JM [ Show all 15 ]
Abstract	Summary: A phenotypically polymorphic barley (Hordeum vulgare L.) mapping population was developed using morphological marker stocks as parents. Ninety-four doubled-haploid lines were derived for genetic mapping from an F1 using the Hordeum bulbosum system. A linkage map was constructed using 12 morphological markers, 87 restriction fragment length polymorphism (RFLP), five random amplified polymorphic DNA (RAPD), one sequence-tagged site (STS), one intron fragment length polymorphism (IFLP), 33 simple sequence repeat (SSR), and 586 amplified fragment length polymorphism (AFLP) markers. The genetic map spanned 1,387 cM with an average density of one marker every 1.9 cM. AFLP markers tended to cluster on centromeric regions and were more abundant on chromosome 1 (7H). RAPD markers showed a high level of segregation distortion, 54% compared with the 26% observed for AFLP markers, 27% for SSR markers, and 18% for RFLP markers. Three major regions of segregation distortion, based on RFLP and morphological markers, were located on chromosomes 2 (2H), 3 (3H), and 7 (5H). Segregation distortion may indicate that preferential gametic selection occurred during the development of the doubled-haploid lines. This may be due to the extreme phenotypes determined by alleles at morphological trait loci of the dominant and recessive parental stocks. Several molecular markers were found to be closely linked to morphological loci. The linkage map reported herein will be useful in integrating data on quantitative traits with morphological variants and should aid in map-based cloning of genes controlling morphological traits
External Databases	http://link.springer-ny.com/link/service/journals/00122/bibs/1103002/11030415.htm
Locus	HVM67 WG380B MWG949A HVM031
Keyword	[ Hide all but 1 of 67 ] aflp aflp marker alleles amplified fragment length polymorphism amplified polymorphic dna barley centromeric regions chromosome cloning cluster density distortion dna dominant doubled haploid lines doubled haploid population doubled-haploid fragment length polymorphism gene genetic map genetic mapping genome hordeum hordeum bulbosum hordeum vulgare intron length polymorphism linkage linkage map loci map map-based cloning mapping marker molecular mapping molecular marker morphological markers morphological traits oregon phenotype polymorphic polymorphic dna polymorphism population quantitative trait random amplified polymorphic dna rapd rapd markers region repeat restriction restriction fragment length rflp rflp marker segregation segregation distortion selection sequence sequence tagged site simple sequence repeat site ssr ssr marker sts system trait variant

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