Genetic studies on TGMS lines for development of superior two line rice hybrids
Abstract
Development of desirable floral and out crossing related characters in TGMS lines plays a key role in two line rice hybrid programme. A set of six TGMS lines were raised during summer 2018 and observed under high temperature regime for floral, morphological, agronomic traits to find out commercially exploitable TGMS lines for two line hybrid seed production. Variability studies were conducted for several characters viz., anther length, anther breadth, panicle exertion rate, stigma exertion rate, glume angle, spikelet sterility, pollen sterility which shows high GCV, Heritability, Genetic Advance could be utilized for selection. The three TGMS lines viz., TNAU 39S, TNAU4S, TNAU 95S showed the wider glume angle opening (˃29⁰), higher panicle exertion rate(˃87%), stigma exertion rate (˃72%) and stable pollen sterility percentage (˃99%). The floral and morphological characterisation studies shows that TGMS lines viz., TNAU 39S, TNAU 45S, TNAU 95S had stable pollen sterility expression with good desirable floral traits viz., higher pollen sterility, wider glume angle opening, high stigma and panicle exertion % for better extent of out-crossing rate and these lines can be utilized for two line hybrid rice breeding programme with high heterotic expression and superior yield.
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.
