Variability analysis and character association for sodicity tolerance in F2:3 biparental population of rice under sodic condition

Abstract

The present investigation was under taken with the objectives to estimate genetic variability for sodicity related traits and its association with grain yield in F2:3 segregating population under slightly sodic condition.. The experiment was conducted at the Agricultural Research Farm of Banaras Hindu University, Varanasi (U. P.), India during kharif, 2018. Analysis of variance revealed significant differences for the traits studied indicating the existence of high genetic variability among the lines. Estimates of phenotypic coefficients of variation (PCV) were higher than genotypic coefficient of variation (GCV) for all the characters studied, indicating considerable effect of environment. Tolerant parent CSR 43 performed better than sensitive parent Pusa 44 for all the traits studied under sodic stress. CSR 43 and the F2:3 lines which showed tolerance response, recorded low shoot Na+ concentration and Na+: K+ ratio, high shoot K+ concentration, total chlorophyll content and all together respond to gain higher yield than susceptible lines. Heritability was highest among the traits studied for total chlorophyll content. Selection for shoot Na+ concentration, Na+: K+ ratio and shoot K+ concentration, total chlorophyll content will support the breeder in any breeding program for further improvement of the traits under sodic condition as these traits showed significant association with grain yield per plant in favorable negative and positive direction, respectively. The present investigation was under taken with the objectives to estimate genetic variability for sodicity related traits and its association with grain yield in F2:3 segregating population under slightly sodic condition.. The experiment was conducted at the Agricultural Research Farm of Banaras Hindu University, Varanasi (U. P.), India during kharif, 2018. Analysis of variance revealed significant differences for the traits studied indicating the existence of high genetic variability among the lines. Estimates of phenotypic coefficients of variation (PCV) were higher than genotypic coefficient of variation (GCV) for all the characters studied, indicating considerable effect of environment. Tolerant parent CSR 43 performed better than sensitive parent Pusa 44 for all the traits studied under sodic stress. CSR 43 and the F2:3 lines which showed tolerance response, recorded low shoot Na+ concentration and Na+: K+ ratio, high shoot K+ concentration, total chlorophyll content and all together respond to gain higher yield than susceptible lines. Heritability was highest among the traits studied for total chlorophyll content. Selection for shoot Na+ concentration, Na+: K+ ratio and shoot K+ concentration, total chlorophyll content will support the breeder in any breeding program for further improvement of the traits under sodic condition as these traits showed significant association with grain yield per plant in favorable negative and positive direction, respectively. © 2020 Plant Archives. All rights reserved.