Vol. 19 No. 1
Combining ability analysis for grain quality traits in hybrid rice (Oryza sativa. L)
Abstract: The two main goals of the majority of crop breeding programs are the identification of the lines that are good performers for commercial distribution and lines that can serve as parents in subsequent crossings.Keeping this in view the idea of combining ability arose. This aids in choosing the parents that have ability to transfer their genes to their progeny particularly through general combining ability and selection of superior crosses through specific combining ability.In the current experiment, the mating design used was line x tester in which four lines were crossed with eight testers and through which 32 hybrids were obtained. Parents and their hybrids along with checks are used for testing 11 quality traits for their combining ability effects. Within male sterile lines, JMS 19B showed significant desirable gca effects for six quality characters viz., hulling, milling, HRR, kernel breadth, gel consistency and alkali spreading value. Within restorers, JGL 34985 showed significant required gca effects for seven grain quality traits viz., hulling, HRR, kernel length and breadth, kernel length after cooking, gelatinization temperature and amylose content and hence they were adjudged as the best combiners for the improvement of the respective traits. Among the hybrids, CMS 64A X JGL 34984 for kernel length and breadth, JMS 13A X JGL 32467 for hulling, milling and head rice recovery and JMS 19A X JGL 34985 for gel consistency and alkali spreading value were recognized to be top hybrids which can be used in further generations.
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