Estimation of genetic parameters in intraspecific bread wheat hybrids
1999
Ansari, B.A. | Larik, A.S. | Khushk, A.M. | Soomro, Z.A. (Sindh Agriculture Univ., Tandojam (Pakistan). Dept. of Plant Breeding and Genetics)
F2 bread wheat populations developed from eight parental lines of diverse heritage were studied for broad sense heritability and genetic advance. F2 hybrids and their parents differed significantly (P 0.01) for alt the traits viz. number of tillers per plant, main spike length, number of spikelets per spike, number of grains per spike, 100 seed weight and grain yield per plant indicating the existence of genetic variation among the genotypes. High heritability coupled with high genetic advance observed in most of the progenies for most of the traits indicated quantitative pattern of inheritance offering better chances of selection for the traits. The cross Sarsabz x Mehran-89 showed significantly highest grain yield (39.48 g) and 100 seed weight (6.73 g) with considerable heritability (76.59% and 74.21% respectively) and low genetic advance probably due to non additive gene effects. The cross Pak-70 x Sarsabz displayed maximum heritability (96.48% associated with the highest genetic advance (2.69) for 100 seed weight indicating involvement of additive gene action. Therefore, both the crosses can be selected towards the improvement of bread wheat.
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