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Accueil du site → Master → Inde → 2006 → Studies on drought tolerance, genetic divergence and character association in mothbean [Vigna aconitifolia (Jacq.) Marechal]

Chaudhary Charan Singh Haryana Agricultural University, Hisar (2006)

Studies on drought tolerance, genetic divergence and character association in mothbean [Vigna aconitifolia (Jacq.) Marechal]

Ranjit Singh

Titre : Studies on drought tolerance, genetic divergence and character association in mothbean [Vigna aconitifolia (Jacq.) Marechal]

Auteur : Ranjit Singh

Université de soutenance : Chaudhary Charan Singh Haryana Agricultural University, Hisar

Grade : Master of Science in Plant Breeding 2006

Résumé partiel
The objectives of the present study were to study the physiological basis of drought tolerance in mothbean, to determine the yield component under dry land conditions, to identify diverse and elite genotypes and suggesting breeding method for further improvement in mothbean. The experiment was conducted during Kharif, 2002 at research area, CCS Haryana Agricultural University, Hisar. In the present investigation, 43 genotypes of mothbean were grown in randomized block design with four replication accommodating spacing 30× 10 cm. Observation on 5 competitive plants for recording of data on different physiological traits and yield components were taken. Substantial amount of coefficient of variation was observed for all the traits/characters under study. A wide range for different traits/characters were also observed. The higher phenotypic coefficient of variation over genotypic coefficient of variation showed in almost all the traits/characters. The estimation of -iv- -4- high heritability wit h high genetic advance was recorded for pod per plant in both the environments while in case of physiological traits it was observed for water retention. On the basis of D2-value 43 genotypes were grouped into nine cluster in E1 and eight in E2. There was no association between clustering pattern and ecogeographical distribution of the genotypes. RMO 257, RMO 40 and Jwala are released varieties were clustered into same cluster in both the environment. In almost all the cases phenotypic correlation coefficient was more than genotypic correlation coefficient. Correlation studied revealed significant positive association of seed yield per plot with 100-seed weight, seed yield per plant, pod per plant, pod per cluster in both environment. Path analysis revealed that maximum direct effect on seed yield per plant was through yield per plot and pod per cluster in E1 and E2 respectively.

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