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Nature of variation and association of seven yield component traits with yield and among themselves were studied using 112 genotypes of blackgram. Considerable variations among the genotypes were observed for all the characters under study. Heritability estimates were high for all the characters. High heritability with high genetic advance for plant height, primary branches per plant, pods per plant, 100- seed weight and yield per plant indicated additive gene action. Selection in these traits would be effective for improvement of blackgram while days to flowering showed high heritability with low genetic advance indicating nonadditive gene action. Correlation analysis indicated highly significant positive correlation between pods per plant, clusters per plant.

Divergence among 112 genotypes for yield and yield contributing traits was carried out by using mahalanobisD2 statistics. The maximum inter cluster distance was observed between cluster XII and IV (18.80) followed by cluster VI and IV (18.79). The maximum intra cluster distance was reported in cluster XII (14.74).The crosses which involve parents from these more divergent clusters will yield relatively good amount of heterosis in F1 and high frequency of transgressive segregants and genetic variability in subsequent generationsBased on the mean performance and diversity studies the genotypes KU 11-667, ABG 11-036, IC 436729 and IC 335331 were found to be the best for further yield improvement.

In the title compound, C25H23N, the indole unit makes a dihedral angles of 79.03 (5) and 61.82 (4)° with the benzene rings. No classical hydrogen bonds are found in the crystal structure.