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Genetic studies on the interspecific cytoplasm substitution lines of an Asian perennial strain of Oryza rufipogon Griff. and O. glaberrima Steud.

  • Cytology and Genetics
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Summary

It is shown that the restorer gene Rf j extracted from the Japanese rice variety Akebono is effective on pollen restoration in the cytoplasm substitution line having the nucleus of Oryza glaberrima and japonica or indica cytoplasm of O. sativa, and is of the sporophytic type.

The Asian perennial type of the wild rice species O. rufipogon is considered to be the progenitor of O. sativa. Two substitution lines having the cytoplasm of a perennial strain of O. rufipogon from Sri Lanka and the nucleus of O. glaberrima with or without the gene Rf j in homozygous condition have been bred by means of successive backcrosses. These lines have now reached the BC5 generation. Plants of the lines resemble morphologically the recurrent parent, but do not show pollen restoration, indicating that the cytoplasm of the rufipogon strain induced male sterility and that the gene Rf j does not act as the restorer.

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  1. College of Agriculture, University of Osaka Prefecture, 591, Sakai, Osaka Prefecture, Japan

    Tomosaburo Yabuno

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  1. Tomosaburo Yabuno
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Yabuno, T. Genetic studies on the interspecific cytoplasm substitution lines of an Asian perennial strain of Oryza rufipogon Griff. and O. glaberrima Steud.. Euphytica 36, 529–534 (1987). https://doi.org/10.1007/BF00041498

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  • DOI: https://doi.org/10.1007/BF00041498

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