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Subject: Genetics and Plant Breeding × Author: Rohit × End date: 2023 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Genetic analysis of natural variability in Sesame (Sesamum indicum L.)
    (CCSHAU, Hisar, 2023-07-24) Rohit; Subhash Chander
    The study was carried out to investigate genetic variability and to assess genetic diversity in 50 sesame genotypes. During kharif 2022, the experiment was conducted in Randomized Block Design with three replications at the experimental area of Oilseeds Section, Department of Genetics and plant breeding, CCS Haryana Agricultural University, Hisar. Each genotype was sown in single row of 3-meter length with spacing of 30 x 15 cm and evaluated for twelve quantitative characters. Analysis of variance showed highly significant differences in the material for all the studied characters. Highest genotypic and phenotypic coefficient of variation was found for seed yield/plant followed by secondary branches/plant, number of capsules/plant, number of primary branches/plant and number of seeds/capsule. High heritability coupled with genetic advance was observed for number of primary and secondary branches/plant, number of capsules/plant, number of seeds/capsule and seed yield/plant. The seed yield/plant showed a significant positive correlation with plant height, number of primary branches/plant, number of capsules/plant, number of seeds/capsule, capsule length, capsule width and 1000-seed weight, and negative correlation with days to 50% flowering, days to maturity and oil content. Path analysis revealed that primary branches/plant and capsule length had positive effects on seed yield/plant while negative effect was shown by days to 50% flowering and oil content. The D2 analysis classified all the genotypes into five clusters. Cluster II had the highest number of genotypes followed by cluster III and cluster I. The highest inter-cluster distance was observed between clusters I and II. Maximum contribution towards genetic divergence was due to secondary branches/plant (20.94%) followed by primary branches/plant (19.51%) and seed yield/plant (17.59). In conclusion, the genotypes NIC-17274-C and NIC-7897 (Cluster I), NIC-8394 (Cluster III) and HT-2 (Cluster IV) should be used in hybridization programme for improvement of seed yield and oil content in sesame.