Inheritance pattern of photoperiod responsive flowering, growth habit and flower colour in Indian bean [Lablab purpureus (L.) Sweet.]
Abstract
Photoperiod responsive flowering and growth habit have played key role in evolution and domestication of Indian bean. Most of the land races of this crop exhibit photoperiod sensitive flowering and indeterminate growth habit. To deduce inheritance pattern of photoperiod responsive flowering, growth habit and flower colour, four crosses were made between genotypes having extreme phenotypes keeping determinate and photoperiod insensitive variety GNIB-21 as common female parent. Pure hybrids were selected on the basis of male dominant traits to raise true F2 generations. Segregation patterns of 3 : 1 in all F2 generations and χ2 estimates indicated that photoperiod insensitive flowering, determinate growth habit and white flower colour are monogenic recessive in nature, while photoperiod sensitivity, indeterminate growth habit and purple flowers are dominant in nature. Linkage analysis in the cross GNIB-21 x GP-189 revealed that loci governing photoperiod responsive flowering and growth habit are placed at the distance of 22.99 cM + 0.022. The analysis also revealed coupling phase of linkage between photoperiod insensitive flowering and determinate growth habit. The information obtained from present study will be helpful for molecular dissection of photoperiod responsive flowering and growth habit in Indian bean utilizing new genomics tools.
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.
