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首页> 外文期刊>Chinese science bulletin >Genetic diversity of rice cultivars (Oryza sativa L.) in China and the temporal trends in recent fifty years
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Genetic diversity of rice cultivars (Oryza sativa L.) in China and the temporal trends in recent fifty years

机译：中国水稻品种的遗传多样性及近五十年来的时间趋势

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摘要

To understand geographical distribution of the genetic diversity of rice cultivars (Oryza sativa L.) and its trends in recent fifty years in China, 453 accessions were analyzed by 36 microsatellites loci and 42 phenotypic traits. Results revealed that the genetic diversity by SSRs is highly consistent with that by phenotypic traits and the genetic diversity of indica cultivars was higher than that of japonica cultivars; the genetic diversity of cultivars declined from 1950s to 1980s and then increased greatly; among the six rice ecological zones (REZs), genetic diversity of REZII was the highest and those of REZV and REZVI were the lowest at both DNA and phenotypic level. Jiangsu and Jiangxi provinces in the middle and lower reaches of Yangtze River and Sichuan province in southwest of China were the areas with the highest genetic diversity. Breeders in REZV which is an important japonica rice area but with very low genetic diversity should explore more gene resources to widen the genetic backgrounds of cultivars.
机译：为了了解中国近50年来水稻品种遗传多样性的地理分布及其趋势，通过36个微卫星基因座和42个表型性状分析了453份材料。结果表明，SSRs的遗传多样性与表型性状高度一致，in稻品种的遗传多样性高于粳稻品种。品种的遗传多样性从1950年代到1980年代下降，然后大大增加。在六个水稻生态区（REZs）中，无论是DNA还是表型水平，REZII的遗传多样性最高，而REZV和REZVI的遗传多样性最低。长江中下游的江苏和江西省和西南的四川省是遗传多样性最高的地区。 REZV是一个重要的粳稻产区，但遗传多样性非常低，因此育种者应探索更多的基因资源，以拓宽品种的遗传背景。

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