Variability and heritability in morphological traits of Polygonatum cirrhifolium germplasm collected from Himachal Pradesh

Polygonatum cirrhifolium (Mahameda) is an important medicinal plant of the Himalayan region facing pressure due to overexploitation. The present study evaluated genetic variability, heritability and genetic divergence among 23 germplasm sources collected from Himachal Pradesh. The experiment was conducted at the Field Research Station, Brundhar, Manali, district Kullu, Himachal Pradesh using a randomized block design with three replications. Significant variation was observed for all morphological traits, indicating substantial genetic variability. PCV values were higher than GCV for all traits, reflecting environmental influence; however, the narrow differences suggested strong genetic control. Heritability ranged from 38.78 to 75.20 per cent, with plant height and number of leaves per node showing high heritability and suitability for direct selection. Cluster analysis grouped the sources into two major clusters, while PCA identified plant height and leaf traits as key contributors to variability. The study highlights the potential for selecting superior genotypes for breeding and commercial cultivation.