首页|Temporal changes in SSR allelic diversity of major rice cultivars in China

Temporal changes in SSR allelic diversity of major rice cultivars in China

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Forty simple sequence repeats (SSRs) were used to assess the changes of diversity in 310 major Chinese rice cultivars grown during the 1950s-1990s. Of the 40 SSR loci, 39 were polymorphic. A total of 221 alleles were detected with an average of 5.7 alleles per locus (Na). The Nei's genetic diversity index(He)varied drastically among the loci (0.207 to 0.874, mean 0.625). Comparing the temporal changes in Na and He, the cultivars from the 1950s had more alleles and higher He scores than the cultivars from the other four decades.Analysis of molecular variance (AMOVA) indicated that the genetic differentiation among the five decades was not significant in the whole set, but significant within indica and japonica. More changes among the decades were revealed in indica cultivars than in japonica cultivars. Some alleles had been lost in current rice cultivars in the 1990s, occurring more frequently in indica. These results suggest that more elite alien genetic resources should be explored to widen the genetic backgrounds of rice cultivars currently grown in China.

rice (Oryza sativa L.)major varietiesSSRgenetic diversityAMOVA

Xinghua Wei、Xiaoping Yuan、Hanyong Yu、Yiping Wang、Qun Xu、Shengxiang Tang

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State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China

国家重点基础研究发展规划(973计划)Key Scientific and Technological Project for Agriculture in Zhejiang ProvinceBasic Research Budget of China National Rice Research Institute

2004CB1172012007C120732006RG001

2009

10.1016/S1673-8527(08)60125-3

遗传学报
中国遗传学会 中国科学院遗传与发育生物学研究所

遗传学报

CSTPCDCSCDSCI
影响因子：0.821
ISSN：1673-8527
年,卷(期)：2009.36(6)
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