Mapping the QTLs associated with pre and post-anthesis developmental stages of wheat under normal and heat conditions

Abstract

Global warming affects the crop productions. In this regards, a recombinant inbred lines (RILs) population derived from Kauz (heat-tolerant) × Montana (heat sensitive) was used to mapping the quantitative trait locis (QTLs) associated with phenological durations in normal and heat conditions over two years. The range of broad-sense heritability was recorded between 0.55 and 0.90. Ninety three QTLs were identified in the wheat genome, some of which were stable in two years and some in one year with minor and major effects. The most stable QTLs mapped on chromosomes 1A and 5A at 0.01cM and another on chromosome 2D at 22.83cM regions. Chromosome 2D carried 45% of all QTLs detected in the present study. The genetic distance between two gwm132-gwm484 markers on chromosome 2D consisted of QTLs with the highest LOD (19) and R2 (76.9%). This study provides valuable information for genes controlling the phenological stages in bread wheat.