GIRIRAJ, K.SUMANGALA, S.2019-09-272019-09-272001-08-07Th-5970http://krishikosh.egranth.ac.in/handle/1/5810129544A total of 22 sunflower genotypes comprising of 4 hybrids, 17 inbreds and one open pollinated variety were evaluated for self-fertility during rainy season (1999) and summer season (2000) at Main Research Station, University of Agricultural Sciences, Dharwad. The four treatments viz., clothbag (autonomous pollination), clothbag + assisted pollination, clothbag + pollination with bulk pollen of sister lines and open pollination were imposed at the time of flowering. Genotypes were considered as main plots and pollination methods were treated as subplots. These 22 sunflower genotypes were evaluated for 12 characters. All genotypes in general, recorded higher seed yield, number of filled seeds, seed filling percentage, test weight, oil content, kernel percentage, autogamy percentage and self-compatibility during summer season as compared to rainy season. In both seasons hybrids were comparatively more self-compatible than inbreds. The genotypes which had low autogamy per cent recorded higher estimates of self-compatibility. It implied that a genotype which was incompatible will exhibit higher self-compatibility when pollen is made available by way of manual pollination. The genotypes recorded significant increase in seed yield, number of filled seeds, seed filling percentage, oil content, kernel percentage, autogamy percentage and self compatibility under open pollination as compared to other three bagging treatments. For all these characters values were highest under open pollination followed by clothbag with bulk pollen pollination, cloth bag with assisted pollination and the lowest under clothbag. Based on the results of two seasons KBSH-1, MSFH-17 and DSF-255 amongst hybrids and RLC-4, IV-55, NDOL-3, TS-42-2-8, and DSF-2 amongst inbreds were found to be more self-compatible over other genotypes. Importance of evaluating the lines for self-compatibility in sunflower breeding has been discussed.ennullThesis