New sources of fertility restoration genes for PET1 male sterile cytoplasm in sunflower
1997
Marinkovic, R. | Atlagic, J. (Institute of Field and Vegetable Crops, Novi Sad (Yugoslavia). Sunflower Department)
Commercial sunflower (Helianthus annuus L.) hybrids have been developed on the basis of the male sterile cytoplasm PET1 and several restorer genes. The study presented in this paper has been undertaken witlh the aim of discovering new genes for fertility restoration of the PET1 cytoplasm. The study included several scores of wild Helianthus annuus and Helianthus petiolaris populations which were collected in the Central Great Plains of the USA in the course of 1991. Nine crosses, in which all F1 plants were fertile, were selected for the analysis of fertility restoration inheritance. All of these crosses incorporated with Helianthus annuus populations. It was found that one dominant gene controlled fertility restoration in five crosses, while two complementary genes controlled fertility restoration in four crosses.
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