Exploration and Suggestion for Introduction of Rice Germplasm from Foreign Countries
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S630.22 F326.12

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    Abstract:

    Since 1949, about 23,890 cultivated varieties (lines) and 2,201 entries of wild rice have been introduced into China and evaluated most being used directly and/or indirectly in rice breeding and production. Among of them, 23 and 75 introduced varieties were cultivated annually over 66,700 hm2 and 6,670-66,700 hm2 in some years, respectively. The restorer lines (R lines), introduced directly and/or bred with foreign R descents, have occupied 95. 7% of total R lines used in hybrid rice. A large number of foreign rice materials have been utilized as crossing parentages in various breeding programs for high yield, good quality and pest resistance in China. Thus, strengthening introduction and utilization of foreign rice germplasm is significant to increase genetic-diversity and to enrich germplasm, which is also one of chinese national strategies to respond to strong competition for bio-genetic resources in the world. According to the newly changing situation, we propose the regularities, direction and ways for strengthening introduction of foreign rice germplasm suitable to China.

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  • Received:
  • Revised:August 06,2004
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