Combining ability analysis for yield and its component traits in groundnut (Arachis hypogaea L.)
Keywords: Groundnut, combining ability, gene action, oil yield, foliar diseases.
AbstractLine × tester analysis was carried out involving six lines and three testers in groundnut for assessing the combining ability for yield and its component characters. Hybrids recorded significant variance for all characters studied. Variance due to parents showed significance for all characters except for shell weight, pod yield per plant, kernel yield per plant and oil yield per plant. The variance due to hybrids vs parents had significance for all characters except for plant height, shelling percentage, oil content and rust disease scores. In case of combining ability ANOVA, lines showed significant variance for all characters except for sound mature kernel. Significant differences were present among the testers for characters viz., plant height and number of pods per plant. The variance due to line x tester had significance for all characters except for 100-kernel weight, oil content, late leaf spot and rust disease scores. The SCA variances were higher than GCA variances indicating the predominance of non-additive gene action for all the characters studied. The parent ICGV 03128 proved to be a good general combiner for oil yield and other economic traits and hence need to be included in the oil yield improvement programmes. The hybrid combinations viz., ICGV 00350 × VRI Gn 6, CO 7 × GPBD 4, ICGV 03128 × GPBD 4, ICGV 03128 × COG 0437 and ICGV 03128 × VRI Gn 6 recorded superior per se for oil yield per plant. Among these crosses ICGV 03128 × GPBD 4 and ICGV 03128 × VRI Gn 6 exhibited additive type gene action with one good general combining ability parent for oil yield per plant, oil content, kernel yield per plant and other characters. Hence, selection can be made in these crosses in early generation itself. The disease scores viz., late leaf spot and rust also recorded non significant sca values indicating that these traits are controlled by additive gene action.
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.