Vol. 12, Issue 2 (2023)

Author(s):
Jogender, Omender Sangwan, Deepak Kumar, Shreya, Ankit Dhillon, Annu and Vishal Saini

Abstract:
The experiment entitled “Assessment of Genetic variability in promising Asiatic cotton (Gossypium arboreum L.) Genotypes under rainfed conditions” was conducted at Research Area of Cotton Section, Department of Genetics and Plant Breeding, CCS Haryana Agricultural University, Hisar, (Haryana). The experiment was carried out in randomized block design involving 50 Asiatic cotton genotypes with three replications during Kharif 2021-22 under rainfed conditions. The observations were recorded on eight morphological traits (plant height, number of monopods/plant, days to first flower, number of bolls/plant, boll weight, seed cotton yield/plant, number of seeds/boll, ginning out turn), six physiological traits (relative water content, photosynthesis rate, stomatal conductance, transpiration rate, total chlorophyll content, proline content) and three biochemical traits (crude protein content, seed oil content, gossypol content). Based on ANOVA, it was revealed that all genotypes exhibited sufficient genetic variability for all the traits. Data was statistically analyzed to estimate various genetic variability parameters and it was found that GCV of each trait was lower than its corresponding PCV. High heritability coupled with high genetic advance expressed as percent of mean exhibited by plant height, number of monopods/plant, number of bolls/plant, seed cotton yield/plant, relative water content, photosynthesis rate, stomatal conductance, transpiration rate and gossypol content which revealed that additive gene action played a predominant role in governing the traits. It indicated the suitability of selection of these traits for further improvement among genotypes under studied.