Nature and magnitude of comparative genetic diverisity was assessed using Mahalanobis's D2 statistics in 64 genotypes (16 parents and 48 F2 crosses) of urdbean genotype grown in monoculture and in association with maize. All thc genotypes were grouped in 9 clusters in case of monocluture, while 7 clusters were formed for intercropping. Some genotypes had consistently the similar clustering pattern in both the cropping systems while others were affected by the cropping system in expressing the genetic diversity. The performance of some genotypes varied from cropping system to another, while that of others remained unaffected. Breeding programme to develop varieties suitable for monoculture, intercrop and both the cropping systems has been suggested.
Urdbean, Cropping system, Genetic divergence, Cluster analysis
