PERFORMANCE OF SEED CLUSTER BEAN (Cyamopsis tetragonoloba L.) CULTIVARS IN GODAVARI ZONE

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Date
2017-06-16
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COLLEGE OF HORTICULTURE, VENKATARAMANNAGUDEM WEST GODAVARI – 534 101 Dr. Y.S.R. HORTICULTURAL UNIVERSITY
Abstract
The present investigation on the performance of seed cluster bean (Cyamopsis tetragonoloba L.) cultivars in Godavari zone was carried out at College of Horticulture, Venkataramannagudem,West Godavari district of Andhra Pradesh during Kharif, 2016-2017. The experiment was laid out in a randomized block design with 14 treatments replicated thrice. Data recorded on various parameters viz., plant height (cm), number of primary branches, number of leaves per plant, leaf area (cm2), days to flower initiation, days to 50% flowering, days taken from flowering to pod drying, number of pods per cluster, number of clusters per plant, number of pods per plant, pod length (cm), weight of dry pod (mg), 100–seed weight (g), number of seeds per pod, gum content (%), protein content (%), pod yield per plot (kg), seed yield per plot (kg) were subjected to the analyses of genetic variability, heritability, character association and path coefficients. The analysis of variance revealed significant differences for the characters under study suggesting considerable amount of variability was existing among the genotypes. Higher magnitude of PCV and GCV (> 20%) were observed for number of pods per plant and number of clusters per plant, indicating the existence of wide range of genetic variability in the germplasm for these traits. High heritability coupled with high genetic advance as per cent of mean was observed in case of number of cluster per plant and days to flower initiation indicating the preponderance of additive gene action, making selection based on these characters more effective. The traits like number of cluster per plant, number of pods per plant, leaf area (cm2), number of leaves per plant and days to flower initiation exhibited a high heritability coupled with moderate genetic advance suggesting that their inheritance was controlled by both additive and non-additive gene actions. The correlation study indicated that number of primary branches, number of seeds per pod, pod yield per plot, number of pods per cluster and leaf area had significant positive association with seed yield per plot at genotypic level. Path coefficient analysis explained 81% variation at genotypic and 58% variation at phenotypic level in the dependent variable i.e. seed yield per plot. A high positive direct effect on seed yield per plot was exerted by the traits viz., number of primary branches, number of seed per pod, pod yield per plot, number of pods per cluster and leaf area. The high direct effect of these traits might here led to their strong association with seed yield. On the other hand, a high negative direct effect was exerted by days to flower initiation and number of leaves per plant. Based on the present investigation, it was inferred that the cultivars HG 365, RGC 1033, HG 884, RGC 1017 and RGC 936 would be more beneficial for seed cluster bean farmers under local conditions.
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The major objectives of the study were to assess the genetic variability, heritability and genetic advance for various yield attributing parameters among seed cluster bean cultivars; to study the association between yield and its attributing parameters and to carry out the path coefficient analysis for yield attributing traits on seed yield per plot of different cluster bean cultivars under local conditions. The experiment was laid out in a randomized block design with 14 cultivars replicated thrice.
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College of Horticulture, Venkataramannagudem,West Godavari district of Andhra Pradesh
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