Variability, heritability and genetic advance for yield and quality components in interspecific F1 hybrids of cotton
Abstract
Assessment of genetic variability using appropriate parameters like phenotypic coefficient of variation (PCV), genotypic coefficient of variation (GCV), heritability (h2), and genetic advance (GA) are really necessary to start an efficient breeding program. Cultivated tetraploid cotton (G. hirsutum x G. barbadense) hybrids were subjected to variability evaluation, heritability and genetic advance in a randomized complete block design during the summer 2016. The analysis of variance was highly significant for the eighteen characters studied. Elongation % recorded the highest coefficient of variation followed by number of seeds/boll, boll weight, lint index and number of monopodia. Phenotypic coefficient of variation (PCV) recorded higher values than their corresponding genotypic coefficient of variation (GCV) for all the characters, this indicated obviously the presence of environmental interaction in phenotypic expression of the traits. Number of monopodia had the highest PCV and uniformity ratio recorded the least. The highest GCV was recorded by number of monopodia followed by seed cotton yield/plant while least GCV was recorded by days to first bursting followed by 2.5% span length and elongation %. Heritability was expressed very high by seed cotton yield followed by number of bolls/plant. Other characters had high heritability except elongation %, 2.5% span length and days to first bursting which recorded low heritability. The most favourable selection response was demonstrated by number of monopodia and micronaire value. Number of monopodia, micronaire value, lint index and boll weight had demonstrated an additive gene effects by having high heritability and high genetic advance over mean, directional selection would have positive effect for their genetic improvement.
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.
