Combining ability and heterosis studies for seed cotton yield and fibre quality traits in hirsutum cotton
Abstract
To study the combining ability, gene action and heterosis, eighteen intra-hirsutum cotton hybrids were developed by crossing three lines (females) and six testers (mlaes) in line × tester design during Kharif 2021 at Regional Agricultural Research Station, ANGRAU, Lam, Guntur. The analysis of variance revealed significant variability among the experimental material for seed cotton yield, lint yield, and fibre quality traits. The non-additive gene action was observed for traits namely, ginning out turn, seed cotton yield, lint yield, and fibre quality traits while the upper half mean length and uniformity index exhibited preponderance of additive gene action. Among the parents, TCH 1837 (Line) and Lam GPC 274 (Tester) were identified as the best general combiners for the traits, bundle strength and elongation while the lines, SCS 1207, GISV 298, and tester Lam GPC 235 were identified as the best combiner for ginning out turn, seed cotton yield, and lint yield. The F1 hybrids viz., TCH 1837 / Lam GPC 117, GISV 298 / Lam GPC 274, and GISV 298 / Lam GPC 51 were identified as the best hybrids and these could be used for exploitation through heterosis breeding as these hybrids exhibited significant per se performance, high positive SCA effects and better parental heterosis for the said characters. The cross combinations namely, GISV 298 / Lam GPC 235 and SCS 1207 / Lam GPC 355 possessed significantly high GCA effects for the parents and non-significant SCA effects for the corresponding hybrids for important yield components and fibre quality traits. Hence, these could be exploited in recombination breeding for improvement of yield and other fibre quality traits in cotton.
Keywords :Cotton, GCA,SCA, Heterosis
Combining ability and heterosis studies for seed cotton yield and fibre quality traits in hirsutum cotton
. 2023. Electronic Journal of Plant Breeding, 14 2, 439-447. Retrieved from https://www.ejplantbreeding.org/index.php/EJPB/article/view/4646It 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.
