Genetic dissection of heterosis and combining ability in castor (Ricinus communis. L)

DOI: 10.37992/2023.1403.113

  • S. Nivedha, S. R. Venkatachalam, P. Arutchenthil,
  • S. Lakshmi Narayanan, S. Manickam and R. Vijayan

Abstract

The estimates of combining ability and nature of gene action were worked out by Line x Tester analysis (Kempthorne, 1957). The experimental material included 45 entries containing six pistillate lines (DPC 9, DPC 21, D PC 24, YRCP 1, YRCP 2 and JP 65), five monoecious lines (TMV 5, SKI 215, 48-1, M3/28-3-1, and JM 6), thirty cross combinations, and four standard checks (YRCH 1, YRCH 2, ICH 66, and YTP 1). Four hybrids (DPC 9 x M3/28-3-1, DPC 9 x TMV 5, JP 65 x M3/28-3-1 and JP 65 x 48-1) exhibited high and significant positive economic heterosis for seed yield. The combining ability analysis demonstrated that the mean sum of squares due to genotypes and crosses were significant for all yield and its contributing traits. The magnitude of genetic variances for 11 quantitative traits revealed the predominance of dominant gene action for all the traits except oil content and hundred seed weight. For most traits, testers contributed more to total variance than the lines and L x T interaction. DPC 9, DPC 24, TMV 5, and JP 65 were identified to be the best general combiners for seed yield and its yield components. The hybrids DPC 9 x M3/28-3-1, DPC 9 x TMV 5, JP 65 x M3/28-3-1, and JP 65 x 48-1 were the most effective specific combiners for seed yield and also exhibited significant and high standard heterosis in the desired direction for seed yield and majority of the yield contributing traits. Hence, these parents and cross combinations could be effectively utilized for development of high yielding castor hybrids.

 Keywords:  Heterosis, Gene action, Combining ability, Seed yield

Published
03-10-2023
How to Cite
S. Nivedha, S. R. Venkatachalam, P. Arutchenthil, S. Lakshmi Narayanan, S. Manickam and R. Vijayan

Genetic dissection of heterosis and combining ability in castor Ricinus communis. L

. 2023. Electronic Journal of Plant Breeding, 14 3, 1000-1007. Retrieved from https://ejplantbreeding.org/index.php/EJPB/article/view/4816
Issue
Vol 14 No 3 (2023): EJPB
Section
Research Article

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.