volume 30 issue 2 (june 2007) : 92-97
GENErIC DIVERSITY IN GRAIN COWPEA {VIGNA UNGUICULATA (L.) WALP}
1Department of Genetics and Plant Breeding,
G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, India
Published In
Legume Research
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volume 30 issue 2 (june 2007) : 92-97
GENErIC DIVERSITY IN GRAIN COWPEA {VIGNA UNGUICULATA (L.) WALP}
1Department of Genetics and Plant Breeding,
G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, India
ABSTRACT
Forty four grain cowpea genotypes were evaluated for thirteen characters to quantify the genetic diversity existing among them by using Mahalanobis D2 statistics. The analysis of variance revealed significant differences among the genotypes for each character under study. The genotypes fell into nine clusters. Cluster strength varied from single genotype (Cluster IV to IX) to 31 genotypes (cluster I). Cluster III had minimum days to rust flower opening, days to 50% flowering and stover yield per plant in addition to maximum number of pod per plant and primary branches. Cluster II, V, VII had maximum yield per plant, 100 seed weight; pod length and number of seed per pod respectively. Cluster II had minimum days to maturity while cluster VII showed maximum days to maturity. The genotype from cluster I (EC 517119, EC 517121) and cluster II (EC 517113) with high cluster mean for yield and yield contributing characters and low cluster means for days to 50% flowering and maturity may be utilized in future breeding programme to obtain high yield and extra early desirable recombinant.
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REFERENCES
- Girish, G. et aI. (2000). Indian J. Plant Genetic Resources, 14(3): 358-360.
- Mahalanobis, P.C. (1936). Proc. Nail. Acad. Sci. India, 2: 49-55.
- Rao, c.R. (1952). Advanced Statistical Methods in Biometrical Research, John Wiley and Sons Inc., New York.
- Thiyagarjan, KR. et a/. (1988). Mardras Agric. J., 75: 125-128.
- Usha Kumari et a/. (2000). Legume Res., 23: 122-125.
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This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
In this Article
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Published In
Legume Research