Genetic Analysis of Yield Traits in Local and Cimmyt Inbred Line Crosses Using LinexTester Analysis in Maize ( Zea mays L.)

摘要

The present study was undertaken to characterize the genetic architecture of various local and CIMMYT inbred line crosses using LinexTester design. The material was generated at Winter Maize Nursery, Amberpet, Hyderabad 2004-2005. The parental lines (15), testers (3) and test crosses (45) were evaluated at two diverse locations of Kashmir valley namely Larnoo and Wadura during 2005. The analysis of variance revealed significant mean squares due to progenies, crosses and parents v/s crosses for all traits. GxE interaction was significant for all traits except ear diameter and 100-seed weight. The analysis for combining ability revealed significant variances due to GCA and SCA for all traits with preponderance of latter. Correspondingly the estimates of genetic components of variance also revealed predominance of non-additive component. The present study identified various parents and crosses in terms of per se performance and GCA and SCA estimates. The implications on maize breeding in light of results of present study have been discussed.