VARIABILITY STUDIES IN F2 POPULATION OF UPLAND COTTON (GOSSYPIUM HIRSUTUM L.) FOR YIELD AND FIBRE QUALITY TRAITS

S. SUBHASHINI¹*, K. KEERTHIVARMAN², DEBADATTA PANDA³, L. ANANDA LEKSHMI⁴, BHIMIREDDY SUKRUTHA^5
1Department of Genetics and Plant Breeding, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
²Department of Genetics and Plant Breeding, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
³Department of Genetics and Plant Breeding, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
⁴Department of Genetics and Plant Breeding, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
⁵Department of Genetics and Plant Breeding, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
* Corresponding Author : subhagokul199646@gmail.com

Received : 11-11-2022     Accepted : 24-12-2022     Published : 30-12-2022
Volume : 14     Issue : 12       Pages : 11967 - 11970
Int J Agr Sci 14.12 (2022):11967-11970

Keywords : GCV, PCV, heritability, GAM, G. hirsutum L., Variability studies, F2 population
Academic Editor : Dr Pratibha Gupta, Manish Baldaniya
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Department of Cotton; Department of Genetics and Plant Breeding, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
Author Contribution : All authors equally contributed

The present experiment on F2 population of MCU 5 x KC 3, CO 14 x KC 3, CO 14 x KC 2 and TCH 1828 x KC 2 was investigated for the variability studies thereby identifying the phenotypic (PCV), genotypic variations (GCV), heritability (h2) and genetic advance as percent of mean (GAM) present in the population. These estimates provide the knowledge of genes that are additive or non-additive in nature. Predicting the nature of gene action would help in formulating the successful breeding programmes for the respective populations under study. For majority of the characteristics, PCV and GCV had a high level of agreement, indicating that the observed variance might be mostly genetic. High heritability along with high genetic advance as percent of mean might be viewed as positive qualities that indicate additive gene activity which was found in the trait seed cotton yield per plant in all the four crosses taken under study and as a result, simple selection method is effective for improvement of such trait. For seed cotton yield associated and fibre quality parameters, moderate to high GCV, PCV, heritability, and genetic advance percent of mean values were found, indicating that these qualities could be passed to the progeny when hybridization was undertaken and phenotypic based selection was effective

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