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GrainGenes Reference Report: GNM-38-516

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Reference
GNM-38-516
Title
Molecular mapping of wheat. Homoeologous group 2.
Journal
Genome
Year
1995
Volume
38
Pages
516-524
Author
Nelson JC
[ Show all 8 ]
Type
Article
Language
English
Abstract
A molecular-marker map of bread wheat having many markers in common with other grasses in the Gramineae family is a prerequisite for molecular-level genetic studies and breeding in this crop species. We have constructed restriction fragment length polymorphism (RFLP) maps of the A-, B-, and D-genome chromosomes of homoeologous group 2 of hexaploid wheat (Triticum aestivum L. em. Thell) using 114 F7 lines from a synthetic x bread wheat cross and clones from 11 libraries. Chromosomes 2A, 2B and 2D comprise 57, 60, and 56 markers and each spans about 200 cM. Comparisons between chromosomes are facilitated by 26 sets of homoeoloci. Genes mapped include a heterologous abscisic-acid acid-responsive locus cloned as pBS128, the epidermal-waxiness inhibitor W2I, and two presumed leaf rust and stem rust resistance genes. Anomalies suggesting ancestral rearrangements in chromosome 2B are pointed out and features of wheat group 2 chromosomes common to barley (Hordeum vulgare L.), rice (Oryza spp.), and T. tauschii are discussed.
Map Data
Triticeae consensus
Wheat, Synthetic x Opata
Trait Study
Stem rust, Nelson95
Image
Synthetic x Opata group 2 maps
Triticeae group 2 consensus, Sorrells