Crop Science and Production Collection

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Browsing Crop Science and Production Collection by Author "Daudi, Happy M."

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    Heritability, stability parameters and paths of influence on yield components of sesame (sesantutn indicum L.) breeding lines
    (Sokoine Univesirty of Agriculture, 2014) Daudi, Happy M.
    Field trials were conducted during the rainy season of 2012 to study the heritability, stability and contributions of some yield attributes to the seed yield of 9 sesame genotypes grown in two spacings at Naliendele, Nachingwea and Tunduru. The experiments were arranged in a split-split plot design in three replications at three sites. Observations were recorded on days to 50% flowering, total plant height, height to first branch, height to first capsule, number of primary branches, capsule on the main stem, number of capsules per plant, leaf spot score, date of harvesting, seed yield and 1000 seed weight. The genotypes varied considerably in the two spacings and GEI was highly significant. The traits, number of first branch, number of capsules per plant and seed yield showed high PCV and GCV estimates. There is scope for selection based on these characters, and the diverse genotypes can provide materials for a sound breeding programme. Most of the characters had low heritability along with low genetic advance; such situation may arise due to non-additive gene action indicating greater influence of environment in the expression of these characters. Seed yield per plant showed positive correlation with days to 50% flowering, total plant height, height to first branch, height to first capsules and capsule per plant. 1000 seed weight showed negative association with seed yield per plant. Genotype Nal. 06. Sc 31 was high yielding and found to suit in more favourable environmental conditions while Mtwara 09 showed to have good adaptability under more unfavourable conditions. According to this experiment, it was concluded that specific genotypes for specific environments are needed in order to maximize grain yield in sesame.