Correlation and Path Coefficient Analysis of Yield Attributes in Grain Sorghum (Sorghum bicolor L.) Genotypes

Abstract

Path coefficient was computed to estimate the contribution of individual traits to yield in grain sorghum .An investigation was carried out with 24 restorer lines of sorghum and one check variety Dorado to asses association of grain yield components and their direct and indirect effects on grain yield/plant during 2019 and 2020 growing seasons at Shandweel Agric. Res. Station, Egypt under four levels of nitrogen fertilization (60, 80 .100 .120 kg N / fed). Results of combined analysis of variance showed that significant or highly significant variations were recorded for environments, genotypes, and their location for various studied morphological and yield traits. The results of correlation analysis indicated that 1000-grain weight, panicle length, panicle width and plant height positive and significant correlation with grain yield. Plant height had maximum positive direct effect on grain yield/plant followed by 1000-grain weight. The best genotype was Rsh-19 for grain yield / plant , Rsh-22 for 1000-grain weight , Adv-44 for panicle width , Rsh-20 for panicle length , Sel pop-13 for earliness and Rsh-12 for plant height. The highest mean values for all traits except days to 50% flowering were obtained under high nitrogen level (120 Kg N/fed) in both two seasons while the reverse was obtained under low nitrogen level (60 Kg N/ fed) in both two growing seasons.