Genetic variability, Correlation and path analysis among some sesame (Sesamum indicum) Genotypes under irrigation system

Abstract

Field experiment was conducted during season 2015/2016 on the demonstration farm of the College of Agriculture Studies, Sudan University of Science and Technology at Shambat to evaluate of ten sesame genotypes under irrigation system and to determine the best genotypes suitable for cultivation and to study the correlation and path analysis. . The experiment was arranged in a Randomized Complete Block Design (RCBD), with three replicates. Parameters recorded included plant height, number of branches/plant, number of capsules/plant, number of seeds/capsules, 1000 seed weight, seed weight and dry weight. The results showed highly significant difference in plant height, number of branches and seed yield between the sesame genotypes. However, the analysis of variance showed that non-significant differences in number of capsules per plant, number of seeds per capsules,1000 seed weight and dry weight between sesame genotype studies. Alsodona genotype sustained the tallest plant height (162.5), while, Alradom, Bash and Tailandi genotypes displayed the shortest plant height (110.0-113.2 cm). The highest number of branches was recorded for Alradom genotype (7.7); however, Bash displayed the lowest number of branches. Abraway genotype displayed the highest number of capsules (62.5 capsules), however, bash and Tailandi displayed the lowest number of capsules (35.2 capsules/plant). The results showed that Carawy produced the highest number of seeds per capsules (64.6 seeds), while Alsodona produced the lowest number of seeds capsules (50.3 seeds). Varity 17 genotype significantly gave the highest thousand seed weight (4.6 g). Alsodona and genotype gave the highest seed yield (21.1 t/ha), while Bash, Alsodona, Soliamani and Alradom genotypes displayed the lowest seed yield (11.4-12.8 t/ha), as compared to others genotypes. Alsodona, Huria15, Carawy and kenana genotypes gave the highest dry weight (0.24-0.28g), while Bash displayed the lowest dry weight (0.12g). Number of capsules and dry weight showed the highest significant positive simple liner correlation with grain yield in combined, whereas number of branches showed the highest significant negative correlation with grain yield in combined. Number of capsules showed the highest direct effect, whereas the highest indirect effect exhibited for number of capsules in path analysis.