Vol. 11, Issue 3 (2022)

Author(s):
BS Thorat, SG Bhave and BD Waghmode

Abstract:
The present experiment was conducted with forty niger genotypes at five locations in Kharif, 2018 and Kharif, 2019 in Randomized Block Design (RBD) with three replications for examine the genetic variability and its other parameters. The significant variation was present among the genotypes for all the traits except capitulum diameter and 1000 seed weight. The environment wise phenotypic coefficient of variation for various characters were ranged from 4.56 to 30.20 (E1), 3.98 to 20.88 (E2), 5.10 to 20.51 (E3), 3.50 to 27.91 (E4) and 5.30 to 23.66 (E5), respectively. The location wise range of genotypic coefficient of variation for various characters was 3.62 to 28.75 (E1), 3.07 to 17.14 (E2), 2.72 to 17.69 (E3), 2.63 to 25.70 (E4) and 3.32 to 20.67 (E5), respectively. The PCV greater than GCV was reported for all the traits under study indicating role of environment in the expression of these traits. The high magnitude of genotypic coefficient of variation for number of primary and secondary branches plant^-1, number of capitulum plant^-1, number of seeds plant^-1, seed yield plant^-1 and seed yield plot^-1 revealed the presence of high genetic variability. The environment wise heritability varied 26.93 to 90.58 per cent (E1), 28.78 to 77.92 per cent (E2), 28.55 to 85.97 per cent (E3), 35.88 to 84.80 per cent (E4) and 35.02 to 83.78 per cent (E5), respectively. The highest heritability was found in number of capitula^-1, days to 50 per cent flowering, number of seeds capitulum^-1 and number of primary branches plant^-1 while lowest in oil content and protein content. Most of the characters i.e., days to 50 per cent flowering, plant height, number of primary branches plant^-1, number of secondary branches plant^-1, number of capitula plant^-1, number of seeds capitulum^-1, 1000 seed weight, seed yield plant^-1, seed yield plot^-1 and days to maturity were exhibited high heritability coupled with high genetic advance indicating additive gene action in the expression of these characters while capitulum diameter, oil content and protein content under the control of non-additive gene action.