J. Pranaya, N. Hari Satyanarayana, V. Roja, A. Srividhya, P. Supriya and K. Jayalalitha
Abstract
Present study was conducted using 250 individuals of F2 population derived from a cross between pre harvest sprouting tolerance genotype PUSA M 19111 and a susceptible genotype LGG 668 to analyze inheritance pattern and gene action of PHS traits in greengram. Sixteen traits pertaining to pre-harvest sprouting (PHS) were studied to determine their distribution patterns. The inheritance studies through chi square analysis revealed that PHS tolerance was found to be predominantly governed by complementary gene action. Further the associated traits namely, water imbibition by seeds and pods (%), hard seeds (%), hard seed (%) in pods, epicuticular wax content, alpha amylase activity (at harvest, 24 hours, 48 hours and 72 hours after germination), pod length, pod beak length, pod wall thickness, surface area, and pre-harvest sprouting (%), exhibited positive skewness with platykurtic distribution. This suggests the presence of complementary gene action, with necessary stringent selection for rapid genetic gain due to the involvement of numerous genes. Conversely, fresh seed germination (%) and pod diameter (mm) displayed negative skewness and platykurtic distribution, indicating the influence of multiple genes with duplicate epistasis interaction. In these cases, mild selection pressure may be sufficient to achieve relatively quick genetic improvement.