Vol. 10, Issue 12 (2021)

Author(s):
Anisa M Nimbal and V Rudra Naik

Abstract:
The aim of this study was to estimate the extent of genetic variability for grain yield, its component traits and physiological traits in F₂ population of the crosses GW 322 X UASBW 11949 and NI 5439 x UASBW 11949. High Phenotypic Coefficient of Variation (PCV)and Genotypic Coefficient of Variation (GCV) were observed for number of productive tillers per plant, grain yield per plant and leaf waxyness while, moderate GCV and high PCV were recorded for thousand grain weight, number of grains per plant and canopy temperature at anthesis stage. For the traits, relative water content and membrane stability index moderate GCV and PCV were noticed. High heritability coupled with high genetic advance over mean was recorded for grain yield per plant and yield related traits ie., number of productive tiller per plant and number of grains per spike as well as for canopy temperature at booting stage while, high heritability coupled with moderate genetic advance over mean was observed for physiological traits viz., relative water content, canopy temperature at anthesis stage and NDVI at anthesis stage indicating better scope for selecting superior transgressive segregants under rainfed condition. Present investigation suggests that selection in F₂ population of GW 322 X UASBW 11949 and NI 5439 x UASBW 11949 would be effective in isolating superior plants for yield parameters in evolving high yielding drought tolerant genotype in wheat.