EVALUATION OF SUNFLOWER (Helianthus annuus L.) GENOTYPES FOR SELF-FERTILITY OVER SEASONS
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Date
2001-08-07
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE
Abstract
A 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.
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