Evaluation for heterosis in okra (Abelmoschus esculentus L. Moench)
Abstract
The present investigation was conducted in okra to study the magnitude of heterosis and to identify potential parents and superior cross combinations for twelve plant traits including fruit yield and its component traits. Forty five F1s were developed by crossing 10 elite lines of okra in half diallel fashion during summer 2016. All 45 F1s along with their 10 parents and one standard check (Nunhems hybrid Shakti) were evaluated in a randomized complete block design with three replications during late kharif(July to October) 2016 at ICAR- KrishiVigyan Kendra, Babbur Farm, Hiriyur, Chitradurga, Karnataka. The results revealed wide range of heterotic pattern for different traits. For first fruit producing node, heterosis over standard control ranged from -9.03 to 43.32, respectively. For days to 50% flowering, heterosis over standard control ranged from -8.70 to 0.72, respectively and for total yield per plant, heterosis over standard control ranged from -0.13 to 168.55,respectively.The overall maximum positive significant heterosis for total yield per plant was observed in cross IIHR-875 x IIHR-478 (168.55%) over standard heterosis. Negatively heterotic crosses like IIHR-562 x IIHR-444 for days to 50% flowering (-8.70%) and IIHR-567 x IIHR-107 for fruiting nodes (-9.03%) respectively, are important to exploit heterosis for earliness in okra. Out of 45 F1s, 44 F1s crosses exhibit significant standard heterosis in any given direction for total yield per plant except cross IIHR-604 x IIHR-107 (-0.13%). The F1 hybrid IIHR-875 x IIHR-478 with high yield potential has the potential for commercial cultivation after further evaluation for late kharif season of Karnataka.
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.
