GENE ACTION AND COMBINING ABILITY ANALYSIS IN CMS BASED HYBRID RICE FOR GRAIN YIELD AND QUALITY ATTRIBUTING TRAITS
Journal Title: International Journal of Agriculture Sciences - Year 2016, Vol 8, Issue 48
Abstract
Study of combining ability and genetic behavior of the parents are essential to search newer hybrid combinations with better grain quality features. An experiment was conducted on twenty one crosses which were generated in line x tester (LxT) fashion by using three CMS lines and seven testers. The LxT interaction was significant for all 23 traits taken under study. The magnitude of specific combining ability variances was higher than that of general combining ability variance for all the traits under study indicating a key role of non-additive gene action in controlling these traits. IR79156A was identified as a good general combiner for grain yield per plant because it exhibited the positive GCA effect with many desirable traits, whereas CRMS32A was identified as best general combiner for most of the quality traits viz., head rice recovery, hulling%, milling%, and elongation ratio. Among the testers, Karmamahsuri, Suraksha, Bagdidhan and TOX981-11-2-3 were found to be a good combiner for grain yield per plant and other related traits. TOX981-11-2-3, Karmamahsuri and Bagdidhan were identified as a good general combiner for head rice recovery and other quality traits. Crosses IR58025AxSuraksha, IR58025AxInger-2114, CRMS32AxKarmamahsuri, IR79156AxKarmamahsuri and IR79156AxRIL-62 showed the higher SCA value for grain yield per plant. IR58025AxSuraksha, IR58025AxTOX981-11-2-3, CRMS32AxInger-2-114 and IR58025AxKanakgopala were identified as promising hybrid based on SCA effect for head rice recovery and other quality traits.
Authors and Affiliations
PARMESHWAR KU SAHU
Keywords
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