Five into five line x tester analysis was progressed to check the combining ability of sunflower inbred line for the development of high er yielding hybrids. Statistical Analysis results revealed that parent vs crosses mean square values were highly significant for traits under study. Combining ability analysis also showed that the female line , A-7, C-2 and C -3 were good general combiner for plant height, number of leaves, days to 50% flowering, head diameter, 100 achene weight, number of achene per head, achene weight per head while e xcluding stem girth and days to maturity . Similarly, testers B-7, C -4 and L -8 were also good general combiner for plant height, stem girth, number of leaves, days to 50% flowering, head diameter, number of achene per head, achene weight per head while excluding days to maturity and 100 achene weight . Specific combining abili ty study of under study genetic material revealed that crosses, A-7×L-8, A-11×L-8, C-2×L-8 C-3×L-4 and C-3×L-8 were proved to be good specific combiner for majority of seed yie ld related components. So these cross combinations might be utilized for the improvement of genetic material for achene yield in sunflower. Key words: Achene yield, GCA, SCA, Sunflower Introduction
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