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A Database for Triticeae and Avena
GSP: Genome Specific Primers
Query Data Types
Links to Related Sites
Agriculture and Agri-Food Canada (AAFC)
The Triticeae Toolbox
USDA-ARS Small Grains Genotyping Labs
U.S. Wheat and Barley Scab Initiative
Two Point Data
GrainGenes Reference Report: EUP-101-91
RFLP mapping of the three major genes, Vrn1, Q and B1, on the long arm of chromosome 5A of wheat.
Chromosome 5A of wheat carries several major genes of agronomic importance, including Vrn1 controlling spring/winter wheat difference, Q determining spike morphology and B1 inhibiting awn development. A population of single-chromosome recombinant lines from the cross between two chromosome substitution lines, 'Chinese Spring' (Cappelle-Desprez 5A) and 'Chinese Spring' (Triticum spelta 5A) was developed to map these genes on the long arm of chromosome 5A relative to RFLP markers. Using 120 recombinant lines, a map of approximately 230 cM in length was constructed. The gene order was centromere- Vrn1- Q- B1. The Vrn1 locus was tightly linked to two RFLP markers, Xbcd450 and Xrz395 with 0.8 cM, and to Xpsr426 with 5.0 cM. The Vrn1-adjacent region was located in the central of the long arm, approximately 90 cM from the centromere. The chromosome region around Q and the 5A/4A translocation break-point were mapped by three RFLP markers, and their order was found to be Q- Xpsr370- Xcdo457-4A/5A break-point- Xpsr164. The B1 locus was located on the most distal portion of the long arm.
Chinese Spring (Cappelle-Desprez 5A)
Chinese Spring (Triticum spelta 5A)