Mapping QTLs for morpho-physiological traits related to grain yield under late sown conditions in wheat (Triticum aestivum L.)

The elevating temperature makes heat stress one of the major issues for wheat production globally. To elucidate genetic basis and map tolerance QTLs agroecology State Bihar under NEPZ, a set 166 doubled haploid lines (DHLs) derived from cross between PBW343/IC252874 was used. population evaluated normal sown (NS) late (LS) conditions two cropping seasons. canopy (CT) showed positive correlations with grain yield, whereas Soil Plant Analysis Development (SPAD) chlorophyll meter value not significantly correlated associated yield (GY) in both conditions. Composite interval mapping identified total 12 quantitative trait loci (QTLs) viz., 2 (NS), 10 mapped on linkage groups 1A, 1D, 2B, 2D, 3B, 4D, 5B, 6D, during crop seasons 2017–18 2018–19. Combining results these revealed stable QTL GY chromosome 3B which explained 11.84% to 21.24% phenotypic variance sowing CT SPAD detected while 5B. could be targeted improvement marker-assisted selection wheat. tools like exploited screen large number breeding lines.