The extent of genetic diversity among popular rice cultivars of Andhra pradesh and Telangana using microsatellite markers
Genetic diversity among 35 rice varieties was investigated using 68 hyper variable polymorphic microsatellite markers to have more insights into the varietal diversity for future selection strategies in development of tailor made rice varieties suitable to different ecological niches of the state. In 68 polymorphic markers, a total of 298 alleles were detected with a range of 2 to 13 with an average allele number (Na) of 4.3 per locus. The Polymorphic Information Content (PIC) values ranged from 0.36 (RM24015) to 0.97 (RM 25310) with an average of 0.85. Overall estimation of number of alleles (Na) and genetic diversity index (He) indicated low to moderate level of diversity among the cultivars. The research station wise estimation on number of alleles (Na) and genetic diversity index (He) clearly indicated that the varieties developed from Rajendranagar varieties exhibited maximum while, Nellore varieties with minimum followed by Jagtial and varieties from remaining stations showed moderate values for both the parameters. The cluster analysis grouped 35 varieties into six clusters. The cultivars developed from Rajendranagar, Maruteru and Warangal tends to group together and the other station varieties are clustered in different groups. The results of this study revealed that genetic diversity among the varieties released from different research stations is moderate and thus warrants the breeders of particularly ARS, Nellore and RARS, Jagtial to broaden the genetic base by selecting diverse parents while making crosses.
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.