caa a22 4500 475793803 CHVBK 20180406123717.0 cr unu---uuuuu 170329e20000801xx s 000 0 eng 10.1007/s001220051508 doi (NATIONALLICENCE)springer-10.1007/s001220051508 Allozyme variation and population genetic structure of common wild rice Oryza rufipogon Griff. in China [Elektronische Daten] [L.-z. Gao, S. G. De-y. Hong] Abstract : In order to determine the genetic diversity and genetic structure of populations in common wild rice Oryza rufipogon, an endangered species, allozyme diversity was analyzed using 22 loci in 607 individuals of 21 natural populations from the Guangxi, Guangdong, Hainan, Yunnan, Hunan, Jiangxi and Fujian provinces in China. The populations studied showed a moderate allozyme variability (A=1.33, P=22.7%, Ho=0.033 and He=0.068), which was relatively high for the genus Oryza. The levels of genetic diversity for Guangxi and Guangdong were significantly higher than those for the other regions, and thus South China appeared to be the center of genetic diversity of O. rufipogon in China. A moderate genetic differentiation (FST=0.310, I=0.964) was found among the populations studied. Interestingly, the pattern of population differentiation does not correspond to geographic distance. An estimate of the outcrossing rate (t=0.324) suggests that the species has a typical mixed-mating system. The deficit of heterozygotes (F=0.511) indicates that some inbreeding may have taken place in outcrossing asexual populations because of intra-clone outcrossing events and ”isolation by distance” as a result of human disturbance. In order to predict the long-term genetic survival of fragmented populations, further studies on gene flow among the remaining populations and the genetic effects of fragmentation are proposed. Finally, some implications for the conservation of endangered species are suggested. Springer-Verlag Berlin Heidelberg, 2000 Key words China nationallicence Conservation management nationallicence Genetic diversity nationallicence O. rufipogon nationallicence Population genetic structure nationallicence Gao L.-z Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, P.R. China Present address: L.-z. Gao Institute of Crop Germplasm Resources, Chinese Academy of Agricultural Sciences, No. 30 Baishiqiao Road, Beijing 100081, P.R. China e-mail: Gaolizhi@ihw.com.cn Tel.: +86-10-62186631, Fax: +86-10-62186629, CN aut Hong S. G. De-y Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, P.R. China Present address: L.-z. Gao Institute of Crop Germplasm Resources, Chinese Academy of Agricultural Sciences, No. 30 Baishiqiao Road, Beijing 100081, P.R. China e-mail: Gaolizhi@ihw.com.cn Tel.: +86-10-62186631, Fax: +86-10-62186629, CN aut https://doi.org/10.1007/s001220051508 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220051508 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gao L.-z Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, P.R. China Present address: L.-z. Gao Institute of Crop Germplasm Resources, Chinese Academy of Agricultural Sciences, No. 30 Baishiqiao Road, Beijing 100081, P.R. China e-mail: Gaolizhi@ihw.com.cn Tel.: +86-10-62186631, Fax: +86-10-62186629, CN aut NATIONALLICENCE 700 1- Hong S. G. De-y Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, P.R. China Present address: L.-z. Gao Institute of Crop Germplasm Resources, Chinese Academy of Agricultural Sciences, No. 30 Baishiqiao Road, Beijing 100081, P.R. China e-mail: Gaolizhi@ihw.com.cn Tel.: +86-10-62186631, Fax: +86-10-62186629, CN aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer