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Correlation between heterosis and genetic distance based on SSR markers in sunflower (Helianthus annuus L.)

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Author(s): Gvodzenović Sandra | Panković-Saftić Dejana | Jocić Siniša | Radić Velimir

Journal: Journal of Agricultural Sciences
ISSN 1450-8109

Volume: 54;
Issue: 1;
Start page: 1;
Date: 2009;
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Keywords: sunflower | heterosis | genetic distance | correlations

ABSTRACT
The objective of this study was to determine the correlation between SSR based genetic distance (GD) of new NS sunflower inbred lines and heterosis for six agronomic traits. Twenty three sunflower inbred lines (20 restorer lines and three female lines used as testers) and their hybrids were examined for plant height, head diameter, thousand seed mass, oil content, seed yield per plant and oil yield per plant. Significant heterosis was observed in hybrid combinations for all examined traits except oil content. Genetic distance between pairs of tested sunflower inbred lines ranged from 0.13 to 0.8. There was no significant positive correlation between genetic distance and mid- and better-parent heterosis, specific combining ability and mean value in any of the examined traits for all 60 hybrids. A highly significant negative correlation was found between GD and mean oil percentage (r=-0.33 p
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