Studies on genetic variability parameters and character association in bread wheat (Triticum aestivum L.) under timely and late sown environments of irrigated condition

Abstract

Sixteen diverse bread wheat genotypes studied at Agharkar Research Institute, Pune (Hol Farm) during rabi season of 2016-17. 
The present study revealed that the mean sum of squares due to genotypes was recorded significant for all the traits studied 
except grain yield per plot and harvest index in timely and late sown condition. The treatment versus genotype found significant 
among the traits days to heading and biomass per plot. The estimates of GCV, PCV, heritability and genetic advance were high to 
moderate in both conditions for the days to heading, productive tillers per meter, TGW, grain per spike, grain weight per spike, 
biomass per plot and grain yield per plot.  Correlation coefficient reveled that, biomass per plot, productive tiller per meter, days 
to maturity gave the positive association with grain yield per plot in both the environments. One genotype was tolerant to grain 
yield per plot viz., HD 3219 (TS = 1052, LS = 934) under timely sown and late sown environments. It has been found that wheat 
genotypes differ their ability to respond to heat, there by tolerance, which could be useful as a genetic stock to develop wheat 
tolerant genotypes in wheat.