QTL mapping of spike fertility index in bread wheat

Abstract Spike fertility index (SF) is a trait easily measured at maturity and strongly associated with the number of grains per unit area. In order to identify genomic regions involved in SF control, biparental (Baguette 10 × Klein Chaja) population 80 recombinant inbred lines (RIL) was used. Seven field trails were conducted determine BLUP value RIL. RILs genotyped using commercial chip (Axiom® 35K SNP Wheat Breeder's Array, Affimetrix). A linkage map constructed 857 markers, QTL mapping performed. The narrow-sense heritability 0.89. Three (QTL) found on chromosomes 2D, 4A, 7A. proportion genetic variation explained by these three 32%, no significant epistatic interaction between QTL.