GENETIC VARIABILITY AND INTERRELATIONSHIP STUDIES IN GREEN SUPER RICE

Abstract

Field experiment was executed using 18 GSR (green super rice) lines of rice during Kharif 2015 at Agricultural Research Institute, D.I. Khan, KP, Pakistan. The aims of the study were to screen out genetic variability among GSR lines of rice and to assess heritability and genetic advance and correlation between yield and related attributes. The experiment was laid down in a randomized complete block design with three replications and data on eight production traits were recorded and subjected to various statistical analysis. The results corresponding to analysis of variance revealed significant (P ? 0.01) differences among GSR lines of rice for all the studied traits. The presence of slightly higher phenotypic coefficient of variation than genotypic coefficient of variation indicated the negligible influence of environment on the expression of yield and its component traits. Similarly, the highest heritability (>60%) associated with genetic advance were assessed for all the traits, except panicle length, indicating additive gene action in their inheritance hence, amenable for simple selection. Correlation analysis revealed that paddy yield manifested significant correlation with days to panicle emergence (r=0.57**), panicle length (r=0.53*) and number of filled grains panicle^-1 (r=0.63*) hence, ample importance should be given to these traits during selection.