Assessment of Genetic diversity in upland cotton (Gossypium hirsutum L.) germplasm accessions to improve their yield and fibre quality traits
Abstract
The improvement of any crop mainly depends upon the nature and magnitude of genetic variability present in the base population. The objective of this study was to assess the genetic diversity and relationship among the G. hirsutum accessions using multivariate Mahalanobis D2 statistics. Fifty four G. hirsutum accessions of diverse origin were utilized in this study. In D2 analysis, the 54 accessions were grouped into into 12 clusters. Grouping of accessions into different clusters was independent of the geographical origin of accessions and it also revealed that single plant yield contributed the maximum divergence of 63.5per cent. The highest cluster mean for number of bolls per plant was recorded by the cluster XI, for boll weight by cluster X, for single plant yield by cluster XII and for Fibre length cluster VI. The crosses between the genotypes of these clusters viz., SVPR 4 (XI), TCH 1732 (X), Okra Narrow (XII), and TCH 1710 (VI) were expected to express high heterotic vigour. The molecular diversity analysis was also carried by using SSR markers. The markers NAU 4900, NAU 2591 were identified as very effective with polymorphism. The outcome of this study will be helpful in selection of parents with wide genetic distances which could be used as parents in hybridization programme and to develop mapping population to identify Quantitative Trait Loci linked to traits of agronomic importance in cotton.
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.
