文献类型： 外文期刊

作者： Wang, Zheng-Feng ¹ ; Liu, Hai-Lin ³ ; Dai, Se-Ping ⁶ ; Cao, Hong-Lin ² ; Wang, Rui-Jiang ² ; Wang, Zhang-Ming ² ;

作者机构： 1.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Guangzhou, Guangdong, Peoples R China

2.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou, Guangdong, Peoples R China

3.Guangdong Acad Agr Sci, Environm Hort Res Inst, Guangzhou, Guangdong, Peoples R China

4.Key Lab Ornamental Plant Germplasm Innovat & Util, Guangzhou, Guangdong, Peoples R China

5.Univ Chinese Acad Sci, Beijing, Peoples R China

6.Guangzhou Inst Forestry & Landscape Architecture, Guangzhou, Guangdong, Peoples R China

关键词： bottleneck; demographic history; genetic diversity; microsatellites; parentage analysis

期刊名称：ECOLOGY AND EVOLUTION （ 影响因子：2.912； 五年影响因子：3.271 ）

ISSN： 2045-7758

年卷期： 2019 年 9 卷 19 期

页码：

收录情况： SCI

摘要： Feng Shui woodlands are naturally or artificially formed green areas in southern China. They are precious for maintaining ecosystem balance in modern semiurban environments. However, they are generally small and geographically isolated from each other, and the status of genetic diversity of the plant species within them has been almost neglected. Therefore, we studied the genetic diversity of the endangered Erythrophleum fordii in eight Feng Shui woodlands (a total of 1,061 individuals) in Guangzhou, a large city in southern China, using microsatellites. For comparison, one population with 33 individuals sampled in a nature reserve was also studied. Although our results indicate that significant demographic declines occurred historically in E. fordii, such declines have not resulted in consistent reductions in genetic variation over generations in Feng Shui populations in the recent past, and the levels of genetic variation in these populations were higher than or comparable to the genetic variation of the population in the nature reserve. In addition, our parentage and paternity analyses indicated widespread and potential long-distance pollen flow within one Feng Shui woodland, indicating the presence of an unbroken pollination network, which would at least partially alleviate the genetic erosion due to habitat fragmentation and the unequal gene contributions of E. fordii parents to their progenies when favorable recruitment habitats are absent under most of the parent trees. Overall, our results suggest that E. fordii in Feng Shui woodlands may not be driven to extinction in the near future. Nevertheless, uncontrolled fast urban development with a lack of awareness of Feng Shui woodlands will cause the local extinction of E. fordii, which has already happened in some Feng Shui woodlands.