Genetic and multivariate analysis of processing and yield traits in sweet potato for varied end-uses

The present study aims to assess the genetic and multivariate component analysis of processing traits, yield traits, weevil resistance and other tuber traits in sweet potatoes based on the evaluation of 12 genotypes, including checks for yield and processing. Significant variability for tuber physical, processing and vine traits was observed. Nearly 75% of the genotypes had dry matter content (>30%), 50% had starch content (>20%), and none was resistant to sweet potato weevils. High genotypic and phenotypic variation, heritability and genetic advance were observed for tuber yield, tuber girth, total sugar and weight. Among the 13 phenotypic traits used in the present study, multivariate analysis identified only eight, contributing to 83.67% of the variation. UPGMA clustering yielded two major clusters and five sub-clusters. S27, Palakkad local, Trivandrum local, Sree Arun, S346, S27, Indira Madhur, EC 321693 and S444 were found suitable for processing. These genotypes can serve as breeding material for developing high-yielding varieties, thereby promoting the industrial utilization of sweet potatoes