PJB-2013-268
GENETIC STUDIES OF SOME YIELD CONTRIBUTING TRAITS OF F2 SEGREGATING GENERATION OF BREAD WHEAT
MAHBOOB ALI SIAL, JAVED AKHTER1, AMEER AHMED MIRBAHAR2, KARIM DINO JAMALI, NAZIR AHMED AND HADI BUX3
Abstract
Studies on heritability estimates were carried out in 30 F2 segregating population originated through cross combinations of six different parental lines/varieties of bread wheat. Genetic parameters such as environmental variance (Ve), genetic variance (Vg), heritability percentage in broad sense (h2 b.s.) and genetic advance (G.A) were calculated for two important yield contributing traits viz., number of grains per spike and grain yield per spike. The highest mean number of grains per spike (80-100.8) and main spike yield (4.0 to 4.58 g) were recorded in 23 progenies. Eighteen progenies showed the highest heritability (81.2 to 94.3%) in broad sense (h2) coupled with higher genetic advance (1.69-30.58%) for number of grains per spike; indicating more effective selection which could be possible from segregating progenies for this particular trait. Twenty six progenies showed the highest heritability (59.4 to 97.1%) for main spike grain yield character. The results depicted that most of the segregating progenies showed genetic improvement in both quantitative traits in terms of more heritability (h2 b.s.) and genetic advance. Identification of superior plants possesses desirable traits with high heritability estimates provide basic understanding of breeding material in early segregating generations. The better progenies could be effectively used to select the superior hybrid plants with desirable genes in successive generations.
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