Genetic Divergence and Character Association in Indian Mustard [Brassica juncea (L.) Czern & Coss]

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dc.contributor.advisorMeena, P.K. Prem
dc.contributor.authorMeena, Hari Om
dc.date.accessioned2021-12-08T09:21:27Z
dc.date.available2021-12-08T09:21:27Z
dc.date.issued2021-12-08
dc.descriptionGenetic Divergence and Character Association in Indian Mustard [Brassica juncea (L.) Czern & Coss]en_US
dc.description.abstractThe present investigation entitled “Genetic divergence and character association in Indian Mustard [Brassica juncea (L.) Czern & Coss]” was carried out during Rabi 2019-20 with 60 genotypes for 14 quantitative characters viz., Days to 50% Flowering, days to maturity, plant height (cm), number of primary branch per plant, number of secondary branch per plant, length of main axis (cm), number of siliquae per plant, number of siliquae on main axis, length of siliqua (cm), number of seeds per siliqua, 1000-seed weight (g), oil content (%), harvest index (%) and seed yield per plant (g). The experiment was laid out in a Randomized block design with three replications at Agricultural Research Station, Ummedganj Farm, Kota (Agriculture University, Kota). The analysis of variance indicated highly significant differences among the 60 genotypes of Indian mustard for 14 quantitative characters studied. The estimates of PCV and GCV for seed yield per plant, 1000-seed weight, number of secondary branches per plant, harvest index, number of primary branches per plant, number of siliquae on main axis, length of siliqua, length of main axis, number of siliquae per plant and number of seeds per siliqua were found moderate which indicated that high amount of PCV and GCV played a considerable role in expression of these traits. High estimates of heritability coupled with high genetic advance for 1000-seed weight, harvest index, number of secondary branches per plant and seed yield per plant indicated that selection would be effective for the improvement of these traits. Genetic divergence assessed by Mahalanobis D2 following Tocher’s methods of clustering. Sixty genotypes studied were grouped into eight clusters. Cluster IV was the largest with 18 genotypes, whereas cluster I was the second largest with 16 genotypes grouped together. Cluster VI was the third largest cluster based on the number of genotypes (8 genotypes) followed by cluster II (7 genotypes) and cluster III (6 genotypes). Two clusters, V and VIII comprised of two genotype each. Cluster VII comprised only one genotype. Maximum intra-cluster distance was recorded forcluster VI, whereas it was lowest for cluster VII. The maximum inter-cluster distance was revealed between cluster V and VIII followed by cluster V and VII, cluster VI and VIII and cluster III and V. The maximum contribution towards genetic divergence was from seed yield per plant followed by 1000-seed weight, number of secondary branches per plant, harvest index, length of siliqua, number of primary branches per plant, number of siliquae on main axis, length of main axis and number of siliquae per plant and number of seeds per siliqua. Correlation study revealed that number of siliquae per plant, number of siliquae on main axis and harvest index exerted high positive significant correlation with seed yield per plant both at genotypic and phenotypic levels. Path coefficient analysis exhibited positive direct effect via days to 50% flowering and number of siliquae per plant (At phenotypic level). Positive direct effect on seed yield per plant observed both at genotypic and phenotypic levels through days to maturity, number of siliquae on main axis, number of seeds per siliqua, 1000-seed weight, oil content and harvest index. The The genotypes RH-725 (16.55 g), Giriraj (15.64 g), RGN-303 (15.60 g), Kranti (15.44 g) and Pusa Jai Kishan (14.92 g), were superior not only for seed yield per plant but also for related traits like harvest Index, number of siliquae per plant, number of primary and number of secondary branches per plant. These superior genotypes may be used for future breeding programme.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810178828
dc.keywordsMustarden_US
dc.language.isoEnglishen_US
dc.pages107en_US
dc.publisherCOLLEGE OF AGRICULTURE, UMMEDGANJ, KOTAen_US
dc.research.problemGenetic Divergence and Character Association in Indian Mustard [Brassica juncea (L.) Czern & Coss]en_US
dc.subGenetics and Plant Breedingen_US
dc.themeGenetic Divergence and Character Association in Indian Mustard [Brassica juncea (L.) Czern & Coss]en_US
dc.these.typeM.Scen_US
dc.titleGenetic Divergence and Character Association in Indian Mustard [Brassica juncea (L.) Czern & Coss]en_US
dc.typeThesisen_US
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