Mapping quantitative trait loci controlling pre-harvest sprouting resistance in a red × white seeded spring wheat cross |
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| Authors: | B Fofana D G Humphreys G Rasul S Cloutier A Brûlé-Babel S Woods O M Lukow D J Somers |
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| Institution: | (1) Cereal Research Centre, Agriculture and Agri-Food Canada, 195 Dafoe Rd, Winnipeg, MB, Canada, R3T 2M9;(2) Department of Plant Sciences, University of Manitoba, Winnipeg, MB, Canada, R3T 2N2 |
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| Abstract: | 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. |
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| Keywords: | Breeding Mapping Microsatellite markers Pre-harvest sprouting QTLs White wheat |
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