Why is this population important?
KS01HW163-4 is a breeding line developed by the Kansas Agricultural Experiment Station from a cross of Trego/Betty ‘S’. It has PHS tolerance similar to the hard red winter variety ‘Jagger’. KS01HW163-4 performed relatively well in western Kansas but was not released due to susceptibility to leaf rust. KS01HW163-4 is susceptible to FHB. Heyne is a hard white winter wheat released by the Kansas Agricultural Experiment Station that is susceptible to PHS, but moderately resistant to FHB.
The primary target for mapping is pre-harvest sprouting tolerance (PHS). Hard white wheat represents an opportunity to improve the competitiveness of the US wheat industry. However, one of the primary constraints to producer acceptance of hard white wheat in the Great Plains and elsewhere is the lack of tolerance to PHS is the commercially grown cultivars. KS01HW163-4 is a hard white winter wheat with PHS tolerance similar to the highly popular hard red winter variety ‘Jagger’. The tolerance appears to be the result of accumulation of genes from within the hard winter wheat germplasm pool. By pedigree, KS01HW163-4 shares little relationship with Clark’s Cream/Cayuga, another major sources of tolerance to PHS. Understanding the inheritance of PHS tolerance in this line will provide the knowledge and molecular tools to develop hard white wheat varieties with commercially acceptable levels of PHS tolerance and thereby remove a major barrier to HWW production. The populations segregates for other traits including resistance to Fusarium head blight (FHB) and leaf spotting diseases.