CHARACTER ASSOCIATION OF SESAME (Sesamum indicum L.)

Abstract

The experiment was conducted in the experimental area of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the time period of March to June 2022 to find out the character association of 32 sesame genotypes. Mean performance, variability, correlation matrix, path analysis and genetic diversity analysis on different yield contributing characters and yield of sesame genotypes was estimated. The longest plant (127.87 cm) was found in the genotype of G-3, whereas the shortest plant (93.29 cm) from the genotype of G-1. The highest yield/plant (307.67 g) was found in the genotype of G-27, whereas the lowest yield/plant (83.20 g) was observed from the genotype of G-10. Phenotypic coefficient of variation was higher than the genotypic coefficient of variation for all the yield contributing traits. In correlation study, significant positive association was recorded for yield/plant of sesame genotypes with number of branches/plant (-0.049), number of capsules/plant (0.879), length of capsule (0.355) and number of seeds/capsule (0.554). Path analysis revealed that days to first flowering had negative direct effect (-0.326) on yield/plant. Number of capsules/plant had positive direct effect (0.859) on yield/plant. Number of branches per plant had negative direct effect (-0.077) on yield/plant. Number of seeds/capsule had positive direct effect (0.290) on yield/plant. Weight of 1000 seeds had positive direct effect (0.267) on yield/plant. In genetic diversity, cluster I was the largest cluster comprising of 20 genotypes followed by cluster II with 9 genotypes, cluster III belongs 2 genotypes and cluster IV have 1 genotypes of sesame. Inter cluster distance was maximum (2.761) between clusters II and III, followed by clusters II and I (11.165). In consideration of yield contributing characters and yield G-27 perform better followed by G-24 and G-9.