Diallel analysis in sorghum for forage yield and attributes by Griffing and Hayman’s approaches
DOI: 10.37992/2023.1403.090
Abstract
Five sorghum (Sorghum bicolor (L.) genotypes were crossed in a half-diallel mating design. Analysis of variance for combining ability revealed that general combining ability (GCA) was significant for all the traits except days to flowering, while specific combining ability was significant for all the studied traits. The variance ratio (δ2GCA / δ2SCA) was less than unity for all characteristics, demonstrating the role of non-additive gene action in controlling yield and component traits. The result of general combining ability (GCA) indicated that the parents SH 1488 and SH 1813 were as good general combiners for both green and dry fodder yield per plant. Result of specific combining ability (SCA) showed that crosses SSG 59 × SH 1488, SH 1488 × SH 1813, SH 1488 × S 652 and SH 1811 × S 652 recorded the highest sca effect for the traits green and dry fodder yield per plant. The t2 test specified the fulfilment of the assumption required under diallel analysis for all studied traits except leaf length (cm) and green fodder yield per plant (g). Non-significant result of t2 value suggested additive dominance model for all the traits except leaf length (cm) and green fodder yield per plant (g). The higher value of H1 compared to H2 for most of the characters suggested that gene sharing frequency in parent genotypes was not equal and that was also supported by the H2 / 4H1 (<0.25). The greater than one value of KD/KR components for most of the traits except leaf width (cm) and HCN content (ppm) suggested the higher frequency of dominant genes than recessive genes in the parents. The estimation of the F component was positive and non-significant for all the traits except leaf width (cm), whose value was negative. In Hayman's graphical analysis, the regression line interrupted Wr axis below the origin suggested over dominance for days to flowering, leaf: stem ratio, number of leaves per plant, stem girth and Brix content.
Keywords: Sorghum, GCA, SCA, Diallel, Hayman's graphical method
Diallel analysis in sorghum for forage yield and attributesandnbsp;by Griffing and Hayman’s approaches
. 2023. Electronic Journal of Plant Breeding, 14 3, 794-802. Retrieved from https://www.ejplantbreeding.org/index.php/EJPB/article/view/4461It 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.
