Gene action and combining ability analyses to develop NPT based rice hybrids in Chhattisgarh plains
AbstractCombining ability in New Plant Type (NPT) lines of rice for hybrid rice breeding programme has been carried out in line x tester mating design involving 3 CMS lines and 6 testers. The analysis of variance for combining ability of all the traits showed that variances due to treatments, parents, hybrids were highly significant. The analysis further revealed highly significant differences for all the characters among the lines, testers and line X tester and parents’ vs hybrids. Among the CMS lines IR 58025A was identified as a good general combiner for grain yield per plant. Among the testers NPT line HR 703 (3.09) was found to be good combiner for grain yield per plant followed by Jirashankar (NPT-Sel) (2.36) and IIRON N-1-114(0.79). The significant difference between lines x tester interaction indicates that SCA attributed heavily in the expression of these traits and demonstrates the importance of dominance or non additive variances for all the traits. Three crosses viz., IR 58025A/HR 703, IR 79156A/IIRON N-1-114, and CRMS 31A /PAU1196 were identified as most promising based on SCA effects, better per se performance and both the parents with high or low GCA effects.
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.