Genetic correlation and path coefficient analysis studies in advanced breeding linesof sesame (Sesamum indicum L.)

Abstract

A total of thirty-four advanced breeding lines of sesame were evaluated in a randomized block design with tworeplications for fifteen traits during summer 2022 along with four checks viz., DS-5, DSS-9, JTS-8, TKG-22 to study thegenetic correlation and path analysis for yield and its component traits in sesame. Character association studies revealedthat seed yield exhibited highly significant positive association with number of capsules on main stem, oil content and yieldper plant at phenotypic level, where as significant negative association with days to fifty per cent flowering and days tomaturity. These characteristics were used as selection criteria for higher yield. However, there was a negative significantassociation between oil content with days to 50 per cent flowering and days to maturity. Number of productive capsulesper plant exhibited highly significant positive association with number of primary branches per plant, number of secondarybranches per plant and number of productive branches per plant. The path coefficient analysis exhibited that seed yield perplant had highest direct effect on seed yield.The traits viz. number of productive capsules per plant followed by days tomaturity, number of secondary branches per plant, days to fifty per cent flowering, internodal lengthand capsule lengthshowed negative direct effect on seed yield. As a result, direct selection for this trait would be successful.