محمد مدرسی

With consideration of harvest index and relationship with grain yield the experiment for locating locus of genes that control of harvest index in two normal and heat stress condition that used inbred lines population of wheat recombinant inbred line population that containing 144 recombinant inbred lines derived from the cross between Kaz (tolerant to heat) and Mantana (heat sensitive) with two parents and 10 commercial cultivars. The experiment was arranged in rectangular lattice design with two replications in the normal planting date (15 November) and late planting date (15 December) in the Shahid Chamran University of Ahvaz. The linkage map using composite interval by 234 primers microsatellite (SSR) and 267 AFLP loci which covered 20 of wheat chromosomes. Combined analysis of data on heat stress and non-stress environment showed a significant difference (P?0.01) for harvest index treat. 6 QTLs in two condition on 2A, 2D, 3D, 3B and 7B chromosomes were located. The highest R2 for QTL located on 2A chromosome was 10.86 present gained. The fewest distance to the nearest adjacent marker equivalent 0.005 and 0.02 centiMorgan related for QTLs located on 3D and 2D chromosomes into AfgcCGb and gwm157 markers respectively.