The Distribution and Effects of Genes Causing F(1) Weakness in ORYZA BREVILIGULATA and O. GLABERRIMA |
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| Authors: | Chu Y E Oka H |
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| Affiliation: | Institute of Botany, Academia Sinica, Nankang, Taipei, Taiwan. |
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| Abstract: | Weakness of F1 plants is frequently found in hybrids between strains of Oryza breviligulata (wild) and O. glaberrima (cultivated rice) endemic to West Africa. A set of two complementary dominant weakness genes, W1 and W2, was found to control the observed F1 weakness. Many breviligulata strains had W1, while most of the glaberrima and semi-wild strains had W2 or were free of both. In the weak F1 plants, tissue differentiation in adventitious roots seemed to be disturbed. Modifier genes affecting the expression of the weakness genes appear to be present also. |
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