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GrainGenes Reference Report: GNM-44-249

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Reference
GNM-44-249
Title
A linkage map of hexaploid oat based on grass anchor DNA clones and its relationship to other oat maps
Journal
Genome
Year
2001
Volume
44
Pages
249-265
Author
Portyanko VA
Hoffman DL
Lee M
Holland JB
Abstract
Summary: A cultivated oat linkage map was developed using a recombinant inbred population of 136 F(6:7) lines from the cross 'Ogle' x 'TAM O-301'. A total of 441 marker loci, including 355 restriction fragment length polymorphism (RFLP) markers, 40 amplified fragment length polymorphisms (AFLPs), 22 random amplified polymorphic DNAs (RAPDs), 7 sequence-tagged sites (STSs), 1 simple sequence repeat (SSR), 12 isozyme loci, and 4 discrete morphological traits, was mapped. Fifteen loci remained unlinked, and 426 loci produced 34 linkage groups (with 2-43 loci each) spanning 2049 cM of the oat genome (from 4.2 to 174.0 cM per group). Comparisons with other Avena maps revealed 35 genome regions syntenic between hexaploid maps and 16-34 regions conserved between diploid and hexaploid maps. Those portions of hexaploid oat maps that could be compared were completely conserved. Considerable conservation of diploid genome regions on the hexaploid map also was observed (89-95%); however, at the whole-chromosome level, colinearity was much lower. Comparisons among linkage groups, both within and among Avena mapping populations, revealed several putative homoeologous linkage group sets as well as some linkage groups composed of segments from different homoeologous groups. The relationships between many Avena linkage groups remain uncertain, however, due to incomplete coverage by comparative markers and to complications introduced by genomic duplications and rearrangements
Gene
Glav3 (Avena)
Nag (Avena)
Rast1-4 (Avena)
Acp-1 (Avena)
Acp-2 (Avena)
Map Data
Oat, OxT
Probe
Lw25
[ Show all 6 ]
Keyword
aegilops tauschii
[ Show all 50 ]
Image
Oat, OxT 1 (KO22)
[ Show all 34 ]