Makhan lalKhyati Singh2024-11-122024-11-122023-11https://krishikosh.egranth.ac.in/handle/1/5810216256The research was conducted on forty okra genotypes under four environmental conditions (E1 & E3: Recommended dose of NPK (100:60:50 kg/ha) and E2 & E4: Biofertilizers (Azotobacter + PSB) + 50% N&P + Recommended K) for seed yield and contributing characters. The investigation was carried out in the Department of Vegetable Science, CCSHAU, Hisar under RBD experimental layout with three replications over two Kharif seasons in 2020 and 2021. Analysis of variance showed highly significant differences among genotypes for all the characters, unveiling the plausible presence of significant genetic variability. The highest genotypic coefficient variance and phenotypic coefficient variance were observed for seed yield per plant and number of seeds per pod indicating greater extent of genetic variability present for these characters. The value of PCV was greater than GCV for all the characters under study depicting the influence of environment. The PCV and GCV were recorded high for seed yield per plant and number of seeds per pod indicating presence of greater extent of genetic variability. High heritability coupled with genetic advance were estimated for number of seeds per pod, seed yield per plant, days to 50% flowering, leaf blade width, number of fruits per plant, fruit diameter, seed yield per plot and number of nodes per plant. This showed a strong influence of additive gene action on such characters; therefore, these characters should be directly selected for further usage in yield improvement of okra. Seed yield per plant had positive correlation with most of the characters except days to 50% flowering and first fruiting node. The pooled analysis of variance over four environments revealed significant variations among genotypes and reported that mean sum of square due to environment and G x E interaction was significant when tested against pooled deviation and pooled error. The variation due to environments (linear) components of variation and environments + (genotypes x environments) interaction was reported highly significant for most of the characters except length of peduncle, leaf blade weight and first fruiting node which emphasized that linear component of environment had major effect on environmental variations influencing the performance of genotypes. Higher magnitude of mean squares for environment (linear) compared to genotypes x environments (linear) indicated that linear response of environment account for the major part of total variation for all the characters studied. Eight inbreds viz., G5, G7, G9, G10, G27, G28, G29 and G31 and five varieties viz., G12, G21, G35 and G36 recorded high mean value, regression coefficient near unity and minimum deviation from regression and were considered average stable across allThe research was conducted on forty okra genotypes under four environmental conditions (E1 & E3: Recommended dose of NPK (100:60:50 kg/ha) and E2 & E4: Biofertilizers (Azotobacter + PSB) + 50% N&P + Recommended K) for seed yield and contributing characters. The investigation was carried out in the Department of Vegetable Science, CCSHAU, Hisar under RBD experimental layout with three replications over two Kharif seasons in 2020 and 2021. Analysis of variance showed highly significant differences among genotypes for all the characters, unveiling the plausible presence of significant genetic variability. The highest genotypic coefficient variance and phenotypic coefficient variance were observed for seed yield per plant and number of seeds per pod indicating greater extent of genetic variability present for these characters. The value of PCV was greater than GCV for all the characters under study depicting the influence of environment. The PCV and GCV were recorded high for seed yield per plant and number of seeds per pod indicating presence of greater extent of genetic variability. High heritability coupled with genetic advance were estimated for number of seeds per pod, seed yield per plant, days to 50% flowering, leaf blade width, number of fruits per plant, fruit diameter, seed yield per plot and number of nodes per plant. This showed a strong influence of additive gene action on such characters; therefore, these characters should be directly selected for further usage in yield improvement of okra. Seed yield per plant had positive correlation with most of the characters except days to 50% flowering and first fruiting node. The pooled analysis of variance over four environments revealed significant variations among genotypes and reported that mean sum of square due to environment and G x E interaction was significant when tested against pooled deviation and pooled error. The variation due to environments (linear) components of variation and environments + (genotypes x environments) interaction was reported highly significant for most of the characters except length of peduncle, leaf blade weight and first fruiting node which emphasized that linear component of environment had major effect on environmental variations influencing the performance of genotypes. Higher magnitude of mean squares for environment (linear) compared to genotypes x environments (linear) indicated that linear response of environment account for the major part of total variation for all the characters studied. Eight inbreds viz., G5, G7, G9, G10, G27, G28, G29 and G31 and five varieties viz., G12, G21, G35 and G36 recorded high mean value, regression coefficient near unity and minimum deviation from regression and were considered average stable across all the environments.EnglishThesis