Genetic diversity, population structure, and genetic relatedness of native and non-native populations of Spartina alterniflora (Poaceae, Chloridoideae)
Genetic diversity, population structure, and genetic relatedness of native and non-native populations of Spartina alterniflora (Poaceae, Chloridoideae)
复制标题
互花米草（禾本科、氯化草亚科）本土与外来群体的遗传多样性、群体结构及遗传相关性
DOI：
10.1007/s10750-014-2117-9
复制
发表时间：
2015-02-01
期刊：
影响因子：
2.6
通讯作者：
Huang, Y.
中科院分区：
文献类型：
--
作者：
Guo, W.;Qiao, S.;Huang, Y.
互花米草是在中国沿海发现的高度入侵物种。为了描述S.为了研究中国互花米草的遗传变异，我们研究了中国三个本地种群和五个非本地种群在叶绿体和核微卫星位点上的遗传变异分布和结构。cpDNA和微卫星数据显示，本地和引进地区之间的遗传多样性和种群分化相当，这是一致的故意在中国的异质性创始群体的历史种植。贝叶斯聚类分析表明，最好的两个集群在引进地区分别对应于人口从大西洋沿岸和墨西哥湾沿岸，而不是由以前的研究提出的三个生态型。研究结果显示，大部分非本地植物可能来自大西洋，而香港种群中的部分植物则可能是大西洋和海湾的基因混合物。研究结果表明，中国不同群体的遗传组成不同，这意味着目前中国群体的不同来源。
Spartina alterniflora Losiel. is a highly invasive species found on the Chinese coast. To characterize the evolutionary mechanisms underlying the success of S. alterniflora in China, we examined the distribution and structure of genetic variation among three native populations at their source locations and five non-native populations in China, at both the chloroplast and nuclear microsatellite loci. Both cpDNA and microsatellite data revealed comparable genetic diversity and population differentiation between the native and introduced regions, which is consistent with the deliberate historical planting of heterogeneous founding groups in China. Bayesian clustering analysis showed that the best two clusters in the introduced region correspond to populations from the Atlantic coast and Gulf coast, respectively, instead of the three ecotypes proposed by a previous study. Investigating genetic composition of individuals suggested that most of the non-native plants might be of Atlantic origin, while some individuals in the Hong Kong population could be genetic admixtures of Atlantic and Gulf origin. This study indicated varied genetic components among populations in China, which imply different sources for the present Chinese populations.