Author(s):

R Eswaran, P Karthikeyan, M Venkatesan, R Elangaimannan and P Thangavel

Abstract: Sesame is regarded as queen of oil seeds by the users because of its superior quality. Association analysis of twenty one hybrids of sesame developed through Line X Tester mating designs revealed. Seven lines and three testers were crossed and the F₁ and parents were evaluated for seven quantitative character. Seven lines viz., FFAT 08 2, FFAT 08 16, FFAT 08 18, FFAT 08 20, FFAT 08 31, FFAT 08 41, FFAT 08 45 and three testers CO 1, SVPR 1 and TMV 6 were involved in this study. The 21 F₁ hybrids were grown in a randomized block design with three replications. Spacing between the rows was 30 cm and seeds were dibbled at the distance of 30 cm with in rows. Observations were recorded for seven quantitative characters viz., plant height, number of branches per plant, number of capsules per plant, capsule length, number of seeds per capsule, 100 seed weight and seed yield per plant. The mean values of ten plants selected at random in each replication were used for the statistical analysis. The path analysis revealed that 100 seed weight, number of seeds per capsule, capsule length and plant height were the most yield attributes as can be seen from their high positive direct effects and significant positive genotypic association with seed yield. The indirect effect of number of branches per plant through capsule length and 100 seed weight were positive and high. Other traits had low negative and negligible indirect effect. The residual effect was low magnitude which showed that most of the important characters contributing to seed yield have been utilized. Thus, from the present study it is concluded that more emphasis should be given on number of capsules per plant, capsule length, number of seeds per capsule and 100 seed weight during selection programme.

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