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Sunflower (Helianthus annuus L.) production in South Africa depends on natural rainfall which is variable and unpredictable, hence the need to develop drought tolerant sunflower genotypes to stabilise production under random stress environments. An exploratory research study was undertaken to determine the effectiveness of using moisture stress selection environments and three secondary traits, head...
Combining ability is one of the most important information breeders use to identify superior inbred lines on the basis of their performance in hybrid combinations. The objectives of our study were (i) to quantify the importance of general combining ability (GCA) and specific combining ability (SCA) variances for seed yield, oil content and oil yield; and (ii) estimate GCA and SCA effects of seed yield,...
As a plant breeding programme matures there is a general tendency to recycle elite inbred parents, a strategy known as advanced cycle pedigree breeding. The challenge with this approach is not only to maintain genetic variability in the base breeding populations but also their usefulness for further genetic advancement in developing experimental hybrids with better performance than the commercial...
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