Abstract
Oil content of the sunflower achene is determined by its components, namely kernel content and kernel oil content. The object of this study was to determine the heterosis and relative contributions of the parents to the achene oil, kernel oil and kernel content of the hybrid. Multiple regression equations showed that the two parents contribute equally to the achene oil content of the hybrids. Heterosis was observed in the kernel oil content and kernel content as well as the achene oil content. A heterotic effect of 47 g kg−1 over the mid-parent value was observed for achene oil content. For the achene oil components, heterotic effect of 44 g kg−1 was obtained for kernel oil content and 24 g kg−1 higher for kernel content. Key words: Sunflower, achene oil content, kernel oil content, kernel content, Helianthus annuus L., heterosis
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