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Morphological and cytogenetical studies of the hybrids between Oryza sativa and Oryza officinalis



Morphological and cytogenetical studies of the hybrids between Oryza sativa and Oryza officinalis



Chinese Journal of Rice Science 10(3): 138-142



Three interspecific crosses were carried out involving 2 accessions of O. officinalis, with resistance to brown planthopper (BPH) and 2 improved susceptible lines of Oryza sativa, and F1, F2 and BC1F1 hybrids were produced via embryo culture. The F1 hybrids showed traits characteristic of O. officinalis, such as purple stigmas, long awns and BPH resistance, and were male-sterile due to the low frequency of chromosome pairing (0.77 bivalents) or failure of anther formation.

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