Top cross analysis of S₇ maize lines to evaluation combining ability of some agronomic traits

抄録

In order to investigating combining ability of the inbred lines for grain yield and other traits, 10 F₁ hybrids of maize with the 10 S7 parental lines and a control cultivar were studied in a randomized complete block design at Kermanshah Mahidasht stations in 2013. The yield and its component traits were measured. Analysis of variance showed significant differences in most traits measured at 1 %. Comparison of the mean showed significant differences between the hybrids were much greater than that resulted in lines. To screen good combination and high yield, topcross analysis showed, that the combination of production lines, KLM80039, KLM80043, KLM80044, KLM80049 and KLM80001 with the MO17 tester has a particular superiority and also was identified as high-performance genotypes and yield components to comparison with control varieties (704). This study suggested that the hybrids KLM80026 × MO17, KLM80039 × MO17, KLM80043 × MO17, KLM80049 × MO17 and KLM80001 × MO17 were promising single cross hybrids and could be used in the maize breeding program.