Gene effects, heterosis and inbreeding depression in Pigeonpea, Cajanus cajan L.
AbstractThe P1, P2, F1, F2, B1 and B2 of four pigeonpea, Cajanus cajan L. crosses were studied for eight metric traits. Individual
scaling tests and joint scaling test indicated that an additive-dominance model was adequate in viz., PRG 100 x ICPL 87119,
LRG 300 x ICP 8863 for number of primary branches per plant and LRG 300 x ICP 87119 for number of primary branches per
plant and number of pods per plant. The results of the rest of the cases suggested the presence of additive, dominance and
epistatic gene effects especially for the traits viz., seed yield and test weight.. Duplicate type of epistasis was prevalent in most of
the cases. A substantial amount of heterobeltiosis over better parent (HBP) was revealed in all the four crosses for seed yield per
plant and for most of its attributes. Inbreeding depression was also observed significant for days to 50% flowering, days to
maturity and number of clusters per plant in the cross PRG 100 x ICPL 87119 indicating the presence of dominance gene action.
Suitable breeding strategies were suggested for the improvement of seed yield in pigeonpea.
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.