Selection parameters for improving grain yield of bread wheat under terminal heat stress

Improving terminal heat tolerance is an issue of top priority in wheat breeding the present era climate change. Present study was carried out to identify association among traits economic importance under stress environment. The grain yield/sq. meter environment recorded highly significant positive correlation both at genotypic and phenotypic level with weight/spike, number spike/sq. meter, harvest index 1000-grain weight crop seasons. Path coefficient analysis using coefficients revealed that days heading contributing maximum direct effect towards yield followed by filling duration. Other characters effects were biological season. Thus, for improving stresses conditions, breeder should aim selecting genotypes bold grains or high /spike, more tillers/sq. higher longer