PJB-2022-556
ESTIMATES OF GENETIC PARAMETERS FOR SOME PRODUCTION TRAITS IN WHEAT ACROSS ENVIRONMENTS
Shuja Ur Rehman Qureshi
Abstract
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To estimate genetic parameters in wheat under two environments, an experiment was carried out at research farm of department of Plant Breeding and Genetics, The University of Agriculture, Peshawar. Seventy wheat genotypes comprising six check cultivars were assessed under normal and late planting conditions in alpha lattice design with two replications. Various morphological traits were studied under both environments. Combined analysis divulged non-significant G x E interaction for all traits except tillers m-2 and grains spike-1. Mean values for days to maturity ranged from 149 to 153 days across both environments where genotype G-99 took minimum days to maturity across both environments. Likewise, mean data for plant height, spike length, tillers m-2, grains spike-1, grain weight spike-1, thousand grain weight, biomass yield, grain yield, harvest index across both environments ranged from 87.15 to 103.5 cm, 9.6 to 12.5 cm, 148 to 391, 47 to 77, 1.53 to 3.07 g, 30.5 to 48.75 g, 2500 to 8625 kg ha-1, 775 to 2975 kg ha-1 and 24 to 39%, respectively. The genotype G-130 appeared to be highest in grain yield (2975 kg ha-1) while genotype G-29 exhibited minimum grain yield (775 kg ha-1). High broad sense heritability estimates were documented for days to maturity (93%) while moderate heritability values were observed for rest of the traits. Similarly, moderate to low magnitude of genetic advance was observed for all traits except tillers m-2, biological yield and grain yield.
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