Combining Ability and Heterosis for Yield and Yield Components Using Diverse Restorer Lines in Pearl Millet (Pennisetum glaucum (L.) R. Br.)
Loading...
Date
2016-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Science, Dharwad
Abstract
The line × tester analysis involving 45 hybrids, 14 parents and three commercial checks (GHB-558, 86 M 52 and Kaveri Boss) were used to assess the magnitude of heterosis and combining ability with respect of grain yield and its components in pearl millet was studied during kharif 2015 at Regional Agricultural Research Station, Vijayapur.
Hybrids showed significant differences for majority of the characters studied indicating that parents selected were genetically diverse. Significant desirable heterosis was observed over mid parent, better parent and checks in many crosses for most of the characters studied. Among 45 hybrids, hybrid ICMA 81A x A5RLT 107 showed highest significant mid parent, better parent and standard heterosis over check GHB-558 for grain yield. While, the hybrids ICMA 96666 x A5RLT 114, ICMA 81A x A5RLT 107, ICMA 88004 x A5RLT 107 and ICMA 81A x A5RLT 119 exhibited highly significant positive heterosis over the check, GHB-558 for fodder yield.
The analysis of variance for combining ability indicated that, mean sum of squares due to female × male interactions were highly significant for all the characters except for productive tillers. The SCA variance was higher than GCA variance and their ratio was less than unity, indicating predominance of dominance variance. The parent ICMA-81A among females and A5RLT 114 among males were the good general combiners for grain yield and its major contributing traits. Whereas, ICMA-88004 and ICMA-81A among females and A5RLT-119 among males were good general combiners for fodder yield. The cross ICMA 96666 x A5RLT 114 registered maximum sca effect for fodder yield. The cross ICMA 81A x A5RLT 107 registered maximum sca effect for grain yield. The parents showing high gca may be extensively used in the crossing programme to create new genetic variability in future years.
Description
Keywords
null