Mapping quantitative trait loci controlling pre-harvest sprouting resistance in a red x white seeded spring wheat cross
Fofana, B., Humphreys, D.G., Rasul, G., Cloutier, S., Brûlé-Babel, A., Woods, S., Lukow, O.M., Somers, D.J. (2009). Mapping quantitative trait loci controlling pre-harvest sprouting resistance in a red x white seeded spring wheat cross, 165(3), 509-521. http://dx.doi.org/10.1007/s10681-008-9766-6
Hard white wheat (Triticum aestivum L.) is a value-added product because of its processing advantages over red wheat; however, white wheat tends to be more susceptible to pre-harvest sprouting (PHS). To identify quantitative trait loci (QTLs) associated with PHS tolerance, we developed a doubled haploid (DH) mapping population from the cross AC Domain (red seeded) × White-RL4137 (white seeded). A genetic map was constructed using microsatellite markers located on chromosome groups 3, 4, 5 and 6. A population of 174 DH lines was characterized for important aspects of PHS including sprouting index, germination index, Hagberg falling number and seed coat colour. A total of 11 QTLs were identified on group 3 chromosomes and on chromosome 5D. Seven QTLs associated with the PHS traits were found to be co-incident with seed coat colour on chromosomes 3A, 3B and 3D. The 5D PHS QTL was notable because it is independent of seed coat colour. © 2008 Her Majesty the Queen in Right of Canada.
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