Examination of the correlation and path coefficients for some sesame (Sesamum indicum L.) genotypes

Abstract

This research was carried out to reveal the direct and indirect effects of certain plant characteristics on the seed yields of several sesame genotypes. Sixteen genotypes were examined to determine correlation relationship and path coefficients in a Mustafakemalpasa location during 2015-2016. In the study, plant heigth, branch number, number of capsules per plant, number of seeds per capsule, 1000 grain weight, seed yield per plant and seed yield per hectare were investigated. According to the results evaluated as averages of two years, seed yield per hectare was significantly and positively correlated with the number of seeds per capsule (r = 0.525**), 1000-grain weight (r = 0.439**), seed yield per plant (r = 0.435**) and number of capsules per plant (r = 0.322**). The highest positive and significant correlation coefficient was reported as r = 0.992** between seed yield in plant and 1000-grain weight. Path analysis was used to show that the number of seeds per capsule had the highest direct positive effect (67.6%) on seed yield per hectare, tracked by plant height with 66.3%. 1000-grain weight realized the lowest direct contribution with 17.1%. Plant height had a negative indirect effects on seed yield per hectare through seed yield in the plant (15.3%) and 1000-grain weight (4.5%). Number of capsules per plant has shown a positive indirect effect of 24.6% on seed yield per plant.