31. Inheritance studies in F2 segregating populations of bread wheat genotypes
Abstract
This study was carried out to determine the inheritance pattern of various agronomic traits in six F2 segregating populations of spring wheat. In this context, an experiment was conducted at the experimental field of Southern Wheat Research Station, Tandojam during Rabi 2014-2015. The experiment was laid out in randomized complete block design with three replications. The experimental material was consisted of nine parents, including Khirman, Imdad-05, Noori, Soughat, Mexipak, Moomal, Marvi, Kiran-95 and Anmol-91 and their six F2 progenies. The analysis of variance of the genotypes (including nine parents and their six F2 progenies) showed that all the defined characters were differed significantly (P<0.05), offering the higher genetic variability among the genotypes which can further be exploited for various breeding programs to improve bread genotypes. On the basis of mean performance, among the parental lines, the parent Khirman exhibited outstanding performance for a range of characters (tillers plant-1, spike length, spikelets spike-1, grains spike-1 and grain yield plant-1). Considering the F2 hybrids, the progeny Khirman × Imdad-05 showed promising results for tillers plant-1, spike length and spikelets spike-1, whereas Anmol × Marvi gave desirable results for grain yield plant-1 and seed index, indicating that above mentioned genotypes may be proved reliable genetic resources. With regards to heritability percentage in broad sense, the F2 progeny Khirman x Imdad-05 expressed high heritability for almost all studied traits, with the exception of grain yield plant-1. This study suggests that most of the yield associated traits have been successfully transmitted. The information generated will be helpful for better understanding and selection of desirable material especially in advance generations.
Keywords: Bread wheat; F2 population; Heritability; Inheritance
