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Twenty-nine genotypes of sweet flag (Acorus calamus L.) were evaluated to estimate genetic diversity, variability, heritability and genetic advance. Among the six clusters formed, cluster II and III had constituted a maximum of eleven genotypes each and cluster I had four genotypes. Cluster IV, V and VI had single genotype. Among the six clusters, cluster III recorded the maximum intra-cluster distance (21.38), followed by cluster II (11.89), indicating that the genotypes included in these clusters are closely related and population within the cluster are homozygous. Highest inter-cluster distance was found between cluster IV and VI (169.31), followed by cluster II and VI (111.43). The high genotypic coefficient of variation and phenotypic coefficient of variation were noticed for number of leaves, leaf length, number of scales, intermodal length, number of lets, rhizome length and rhizome weight, suggesting greater phenotypic and genotypic variability among the genotypes and responsiveness of the attributes for making further improvement by selection. Moderate phenotypic coefficient of variation and genotypic coefficient of variation estimates were observed for plant height and leaf width, indicating moderate range of genetic variability and considerable influence of environment in the expression of these traits. Based on the variation present in the genotypes as exhibited by the estimates of various parameters, continuous selection can be adopted for crop improvement in sweet flag. |
