The Asian Journal of Horticulture

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Genetic Divergence in Dolichos Bean (dolichos Lablab l. Var. Typicus) Genotypes for Yield and Yield Contributing Traits


Affiliations
1 College of Horticulture, Dr. Y.S.R. Horticultural University, Rajendranagar, Hyderabad (A.P.), India
2 Vegetable Research Station, Dr. Y.S.R. Horticultural University, Rajendranagar, Hydearabad A.P., India
3 National Bureau of Plant Genetic Resource Regional Station, Hydearabad A.P.
4 College of Agriculture, Acharya N.G. Ranga Agricultural University, Rajendranagar, Hydearabad A.P., India
     

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Mahalanobis D2 statistics was used to study the genetic divergence for 19 characters among 48 genotypes of Indian bean. Genotypes were grouped in to eight clusters on the basis of relative magnitude of D2 values. The highest number of genotypes (14) appeared in cluster III. The maximum inter cluster distance was observed between cluster IV and cluster VI followed by cluster IV and VIII. The minimum inter cluster distance was observed between cluster I and cluster IV. Maximum intra cluster distance was in cluster V followed by cluster III. The mean value for most of the traits was highest in cluster VIII. Among the yield contributing characters, the maximum contribution towards divergence was made by protein content followed by number of flowers per inflorescence, pod length and number of pods per plant. Hybridization between cluster IV and VI could be utilized for getting the superior recombinants or transgress segregants in segregating generations.

Keywords

Dolichos Bean, Genetic Diversity, Hybridization
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  • Genetic Divergence in Dolichos Bean (dolichos Lablab l. Var. Typicus) Genotypes for Yield and Yield Contributing Traits

Abstract Views: 399  |  PDF Views: 0

Authors

V. Chaitanya
College of Horticulture, Dr. Y.S.R. Horticultural University, Rajendranagar, Hyderabad (A.P.), India
R. V. S. K. Reddy
Vegetable Research Station, Dr. Y.S.R. Horticultural University, Rajendranagar, Hydearabad A.P., India
S. R. Pandravada
National Bureau of Plant Genetic Resource Regional Station, Hydearabad A.P.
M. Sujatha
College of Agriculture, Acharya N.G. Ranga Agricultural University, Rajendranagar, Hydearabad A.P., India

Abstract


Mahalanobis D2 statistics was used to study the genetic divergence for 19 characters among 48 genotypes of Indian bean. Genotypes were grouped in to eight clusters on the basis of relative magnitude of D2 values. The highest number of genotypes (14) appeared in cluster III. The maximum inter cluster distance was observed between cluster IV and cluster VI followed by cluster IV and VIII. The minimum inter cluster distance was observed between cluster I and cluster IV. Maximum intra cluster distance was in cluster V followed by cluster III. The mean value for most of the traits was highest in cluster VIII. Among the yield contributing characters, the maximum contribution towards divergence was made by protein content followed by number of flowers per inflorescence, pod length and number of pods per plant. Hybridization between cluster IV and VI could be utilized for getting the superior recombinants or transgress segregants in segregating generations.

Keywords


Dolichos Bean, Genetic Diversity, Hybridization