Combining ability and heterosis studies for grain yield and its components in hybrid rice (Oryza sativa L.)
Keywords: Hybrid rice, combining ability, heterosis, grain yield
AbstractThe study was conducted to know the nature of gene action and level of heterosis in rice hybrids. Analysis of variance revealed the prevalence of non-additive gene action for the traits studied except for days to 50% flowering. The CMS lines IR-79156A and IR-58025A and testers WGL-3962, RNR-15038 and RNR-2781 were best combiners for most important yield contributing traits, like number of productive tillers per plant, number of filled grains per panicle and grain yield per plant by exhibiting positive gca effects. The hybrids, IR-58025A x RNR-15038, IR-79156A x NWGR-3132, IR-58025A x RNR-2781, IR-79156A x RNR-2781 and APMS-6A x RNR-15038 were considered as potential cross combinations for grain yield and its attributes based on per se performance, sca effects, gca effects of parents and standard heterosis. These hybrids could be further evaluated in multi locational trials for commercial use.
It is certified that:
- The corresponding author is fully responsible for any disputes arising due to the publication of his/her manuscript.
- The article has been seen by all the authors who are satisfied with its form and content.
- The sequence of names of authors in the by-line is as per their relative contribution to this experiment, giving due credit to all scientists who made notable contribution to it.
- All the authors fully understand that inclusion of any other co-authors or exclusion of any co-authors is not possible once the article has been submitted to the journal.
- The corresponding author takes full responsibility for this article.
- The address of the organization where the research was conducted is given.
- The article is exclusive for this journal, and the results reported here have not been sent (and will not be sent during its consideration by this journal) for publication in any other journal.
- Authors agree to abide by the objective comments of referees and do agree to modify the article into a short note as per the recommendation, for publication in the Electronic Journal of Plant Breeding.
- If published in Electronic Journal of Plant Breeding, the copyright of this article would vest with the Indian Society of Plant Breeders, who will have the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in it, and neither we nor our legal heirs will have any claims on royalty.