抄録
Genetic divergence among 107 grasspea genotypes was estimated based on the morphological traits using Mahalanobis generalized distance (D2) analysis to group the grasspea genotypes. Significant variations among grasspea genotypes were observed in respect of days to 1st flowering, days to 50% flowering, days to maturity, plant height, number of pods per peduncle, number of pods per plant, number of seeds per plant, 100 seed weight and yield per plant. The first female flower initiation was earlier in BD-5936 (49 days) than the other genotypes. BD-5039 produced significant maximum number of pods per plant (69.00). The highest grain yield per plant (40.88 g) was recorded from entry BD-5363 genotype while the lowest (7.4 g) was in BD-4921 genotype. A total of 74.66 % variation was observed from PCA against first six eigen values while only first two values were responsible for the variation at 38.42%. Considering the mean values, the genotypes were grouped into ten clusters. The highest number of genotypes (21) was belonging to cluster V and lowest (5) belonging to cluster III. The highest mean values for days to maturity (123.9), pod width (66.3 cm), number of seeds per pod (5.03), number of seeds per plant (333.4) and seed yield per plant (25.0 g) were found in cluster VI. The highest mean values for plant height (96.6 cm) and pod length (1.13 cm) were found in cluster VII. Among them, the highest inter-cluster distance was obtained between the cluster III and VI (27.32) followed by VI and VIII (24.07) while the lowest was between I and II (0.81) followed by cluster. The intra-cluster distance was highest (0.58) in cluster IX. The maximum value of inter-cluster distance indicated that genotypes belonging to cluster III were far diverged from those of cluster VI.
