Genetic diversity and population structure in Elephantopus scaber (Asteraceae) from South China as revealed by ISSR markers
文献类型: 外文期刊
作者: Wang, L. 1 ; Liu, J. 2 ; Zhang, W. 2 ; Wang, Q. 2 ; Zhao, X. 3 ; Liu, N.; Zhong, Y.;
作者机构: 1.Fudan Univ, Sch Life Sci, Minist Educ Key Lab Biodivers Sci & Ecol Engn, Shanghai 200433, Peoples R China
2.Fudan Univ, Sch Life Sci, Minist Educ Key Lab Biodivers Sci & Ecol Engn, Shanghai 200433, Peoples R China; Yunnan Acad Agr Sci, Biotechnol Res Inst, Kunming, Peoples R China; Chinese Acad Sci, S China Bot Garden, Guangzhou, Peoples R China
3.Fudan Univ, Sch Life Sci, Minist Educ Key Lab Biodivers Sci & Ecol Engn, Shanghai 200433, Peoples R China; Yunnan Acad Agr Sci, Biotechnol Res Inst, Kunming, Peoples R China; Chinese Acad Sci, S
关键词: Elephantopus scaber;genetic diversity;ISSR;population structure
期刊名称:PLANT BIOSYSTEMS ( 影响因子:2.838; 五年影响因子:2.146 )
ISSN: 1126-3504
年卷期: 2006 年 140 卷 3 期
页码:
收录情况: SCI
摘要: We used inter-simple sequence repeat (ISSR) markers to investigate genetic variation in eight natural populations of Elephantopus scaber from South China, including Guangdong, Hainan and Hong Kong. Eleven primers produced 247 bands across all 184 individuals, of which 243 (98.4%) were polymorphic. The average genetic diversity at the species and population levels was estimated to be 0.283 and 0.103, respectively, using mean expected heterozygosity. The average gene differentiation (F-ST) among populations was 0.725. AMOVA analysis showed that the partition of molecular variation between and within populations was 72.5% and 27.5%, respectively. The effective number of migrants among populations based on the FST was relatively low (N. = 0.095). Cluster analysis based on Nei's genetic distance and the neighbour-joining method revealed the genetic relationships among the populations of E. scaber. The Mantel test indicated that there was no significant correlation between population genetic and geographic distances. The results obtained from the AMOVA analysis, the cluster analysis, and the Mantel test all suggested that fragmented local environments and human disturbance might play important roles in shaping the population structure of E. scaber.
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