STUDIES ON GENETIC PARAMETERS IN COWPEA [Vigna unguiculata (L.) Walp.] UNDER DIFFERENT GROWING SEASONS
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Date
2020-10-29
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Banda University of Agriculture & Technology, Banda Uttar Pradesh
Abstract
The present investigation entitled “Studies on genetic parameters in cowpea [Vigna unguiculata (L.) Walp.] under different growing seasons” was carried out with 15 varieties with 3 replications in randomized block design at vegetable research farm. BUAT, Banda during summer and kharif season in the year 2019. To determine the extent of variability and correlation coefficient among the important economic traits, find out the direct and indirect effects of yield and drought tolerance indices. Observations were recorded on five randomly selected plants for these characters viz., days to first flowering, days to 50 % flowering, days to first pod picking, days to final pod picking, plant height (cm), number of branches per plant, specific leaf area (cm2), pod diameter (cm), pod length (cm), number of pods per plant, number of seeds per pod and pod yield per plant (g). Based on the performance of genotypes Kashi Nidhi followed by Kashi Unnati and Kashi Gauri were found as most promising genotypes for pod yield per plant (g) in summer season whereas genotypes Kashi Kanchan followed by Swarn Mukut and Swarn Suphala in kharif season. The estimates of PCV were higher than the corresponding GCV for all the traits. During summer season the GCV and PCV were high for various characters viz. plant height, pod yield per plant (g), number of pods per plant, while for kharif season high they were recorded for plant height and specific leaf area. During the summer season high heritability was observed for pod diameter and specific leaf area. During the kharif season high heritability was recorded for specific leaf area and plant height. During summer and kharif season, the magnitude of genotypic correlation has been found higher than the corresponding phenotypic correlation for all the traits that indicate inherent association among various characters. During summer season the pod yield per plant showed highly strong positive association with number of seeds per pod followed by pod diameter and pod length. In the kharif season pod yield per plant showed highly strong positive association with number of seeds per pod followed by number of pods per plant and specific leaf area. The genotypic path coefficient analysis for pod yield and its contributing traits for summer season expressed that number of pods per plant was observed highest positive direct effect followed by pod length, plant height, specific leaf area and days to first flowering. In kharif season specific leaf area was observed highest positive direct effect followed by number of branches per plant and plant height. Analysis of data related to heat stress indices revealed that Arka Garima and Arka Suman were found highly susceptible varieties and Kashi Shyamal, Kashi Nidhi, Kashi Kanchan, Kashi Unnati, Swarn Harita and Swarn Suphala were found high heat stress tolerant varieties.
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SINGH SHIVAM 2020. STUDIES ON GENETIC PARAMETERS IN COWPEA [Vigna unguiculata (L.) Walp.] UNDER DIFFERENT GROWING SEASONS. M.Sc. Thesis. 105p.