Mapping loci associated with milling yield in wheat (Triticum aestivum L.)

A partial genetic linkage map constructed using 150 single seed descent (SS D) lines generated from a cross between the hexaploid wheat varieties 'Scho mburgk' and 'Yarralinka' was used to identify loci controlling milling yiel d. Milling yield data were obtained using seed collected from field trials conducted at different sites over two seasons. The estimated broad-sense he ritability of milling yield in this population was calculated as 0.48. In t he preliminary analysis, two regions were identified on chromosomes 3A and 7D, which were significantly associated with milling yield and accounted fo r 22% and 19% of the genetic variation, respectively. Bulked segregant anal ysis in combination with AFLP identified other markers linked to these loci , as well as an additional region on chromosome 5A, which accounted for 19% of the genetic variation. The applicability of these markers as selection tools for breeding purposes is discussed.