Isolation and early generation evaluation of inbred lines derived from yellow pool population of maize Zea mays L

Abstract

An investigation was undertaken to isolate and to evaluate the inbred lines which newlinewere derived from the newly constituted yellow pool population. The 800 ear-to-ear progenies newlineselected from base population showed platykurtic distribution for cob weight and grain yield newlineper plant with high mode values than their respective mean indicating the presence of high newlineproportion of superior progenies for these traits. newlineThe analysis of variance due to genotype was highly significant for all the traits under newlinestudy involving 400 S1 progenies which suggested presence of high degree of variability. The newlineanalysis of variance involving 350 S2 lines revealed the presence of highly significant newlinedifferences among these lines for growth and yield related traits. newlineOut of 350 top crosses, 13 crosses recorded more than 10 per cent higher grain yield newlineover the standard check. In general superiority of these crosses was due to higher grain newlinenumber per plant and lower pith weight. newlineLine × tester analysis involving 25 best lines selected based on top cross newlineperformance and four tester indicated presence of significant variability among the genotypes newlinefor yield and yield contributing traits. Among the crosses, ARYP-24 × CM-111 and ARYP-15 × newlineCM-111 were the superior crosses for grain yield over best check hybrid. newlineThe analysis of combining ability revealed that SCA variance was higher than GCA newlineindicating predominance of non-additive variance for majority of the traits. Out of 25 lines, newlineARYP-3, ARYP-19, ARYP-20, ARYP-24 and ARYP-25 were the good general combiners. It is newlineproposed to evaluate two crosses viz., ARYP-24 × CM-111 and ARYP-15 × CM-111 on large newlinescale over locations and seasons to confirm their potentiality for exploitation of hybrid vigour. newline