Variability and Correlation-coefficient Analysis for Some Proximate Components of Lablab purpureus (L.) Sweet Genotypes of Assam

Abstract

Background: Lablab purpureus (L.) Sweet is an important and primarily consumed vegetable crop in Assam. Large number of genotypes of Lablab purpureus (L.) Sweet are available in Assam, India, which are prosperous source of the gene pool. However, there has been limited understanding of the genetic background of the various proximate components of Lablab, although we primarily use the crop for these proximate components. The present study helps us understand the genetic background of the various proximate components so that they can be efficiently utilized to further improve the genotypes. Methods: Sixteen (16) genotypes of Lablab purpureus (L.) Sweet of Assam were collected from the 6 (six) Agro-climatic zones of Assam, their genetic variability were assessed and correlation analysis with respect to their proximate components during the period 2020-2023. The various proximate components that were analyzed includes moisture, ash, fibre, fat, crude protein content and total carbohydrate content. Various genetic parametres were also determined which included heritability, genotypic and phenotypic coefficient of variance (GCV and PCV) and genetic advance percentage of mean (GAPM). Result: Significant differences were found among the genotypes in all studied traits in the study. GCV and PCV revealed variability and less influence of the environment that supports the influence of heritable components on traits. High heritability and genetic advance for all the traits indicated action of additive genes. Heritability along with GAPM is a positive indicator of expected progress through selection. The study will help us in understanding the genetic parameters associated with the various proximate components.