Genetic variability heritability and genetic advance studies in cotton (Gossypium hirsutum l.)
Abstract
The present experiment was carried out at research farm of Cotton Research Station, Srivilliputtur, to determine genetic variability, heritability and genetic advance estimates in upland cotton. The analysis of variance involving a set of fourty two improved hirsutum genotypes received from various research institutes under AICRP on Cotton for eleven characters viz., Days to 50 % flowering, Plant height, Number of monopodia per plant, Number of sympodia per plant, Number of bolls per plant, Boll weight, Ginning percentage, Upper Half Mean Length, Bundle strength, Micronaire value, and Seed cotton yield (kg/ha) revealed highly significant mean sum of squares for all the characters indicating greater diversity among the genotypes. The value of Phenotypic Coefficient of Variation (PCV) is greater than Genotypic Coefficient of Variation (GCV); it means that the apparent variation is not only due to genotypes but also due to influence of environment. The difference between the estimates of PCV and GCV were low for all the characters except number of monopodia per plant, number of sympodia per plant and number of bolls per plant thereby indicating that lesser role played by the environment in the expression of these characters. The traits like Days to 50% flowering, Plant height, Boll weight, Seed cotton yield (kg/ha), Upper half mean length, Micronaire value and Bundle strength exhibited high broad sense of heritability and moderate sense of heritability was observed for Number of monopodia per plant, Number of sympodia per plant, Number of bolls per plant and Ginning percentage. High heritability coupled with high genetic advance as a percent of mean was recorded for boll weight, seed cotton yield and micronaire value indicated the major role of additive gene action in the inheritance of these characters. Thus, these characters may serve as an effective selection parameter during breeding programme in the upland 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.
