Hierarchical clustering, genetic variability, correlation and path analysis studies in cowpea (Vigna unguiculata L. Walp.)
DOI:
https://doi.org/10.59797/jfl.v27i2.820Keywords:
Genetic variability, Correlation coefficient, Path analysis, Multivariate clustering, CowpeaAbstract
The present investigation was carried out on 43 diverse genotypes of cowpea to study the genetic variability, heritability, genetic advance, correlations and path coefficient for different traits and to identify diverse genotypes of cowpea belonging to different culti-groups through multivariate analysis. A fairly high degree of variability was observed for most of the traits. Higher estimates of heritability coupled with the higher genetic advance for plant height, number of peduncles per plant, number of pods per plant and pod yield per plant indicated that these traits are under the control of additive genes. Correlation analysis pointed out the importance of number of branches/ plant, peduncles/plant, pods/plant, pod length, pod weight and number of seeds/pod towards pod yield. Forty three genotypes were mainly divided into 2 clusters with 38 and 5 genotypes at the first node. The representatives of distant clusters would be more useful for choosing the parents in cowpea breeding programme.
References
Dewey DR and Lu KH. 1959. A correlation and path coefficient analysis of components of crested wheat grass seed production. Agronomy Journal 51: 515-578.
Hazra P, Som MG and Das PK. 1992. Selection of parents for vegetable cowpea breeding by multivariate analysis. Vegetable Science 19: 166-173.
Johnson HW, Robinson RW and Comstock RE. 1955. Estimate of genetic and environmental variability in soybean. Agronomy Journal 47: 314-318.
Lal H, Rai M, Shiv Karan, Verma A and Ram D. 2007. Multivariate hierarchical clustering of cowpea germplasm (Vigna unguiculata L. Walp.). Acta Horticulturae 752: 413-416.
Peter JP and Martinalli JA. 1989. Hierarchical cluster analysis as a pool to manage variation in germplasm collection. Theoretical and Applied Genetics 78: 42-48.
Suganthi S and Murugan S. 2008. Association analysis in cowpea (Vigna unguiculata L. Walp.). Legume Research 31(2): 130-132.
Vishwa Nath, Lal H, Rai M, Rai N and Ram D. 2009. Hierarchical clustering and character association studies in cowpea (Vigna unguiculata L. Walp.). Indian Journal of Plant Genetic Resources 22: 22-25.
