Patterns of geographic distribution have a considerable influence on population genetic structure in one common and two rare species of Rhododendron (Ericaceae)
Patterns of geographic distribution have a considerable influence on population genetic structure in one common and two rare species of Rhododendron (Ericaceae)
复制标题
DOI：
10.1007/s11295-014-0723-3
复制
发表时间：
2014-04
影响因子：
2.4
通讯作者：
Watanabe Yoichi;N. Tomaru
中科院分区：
文献类型：
--
作者：
Watanabe Yoichi;N. Tomaru
遗传多样性对于物种维持其种群和进化潜力至关重要。为了制定有效的珍稀物种保护策略，有必要了解常见和稀有物种之间的遗传多样性模式的差异。种群遗传结构的数据对于设计有效的珍稀物种保护策略具有重要意义。本研究比较了常见种魏氏杜鹃（Rhododendronweyrichii）与两种不同地理分布的珍稀种圣杜鹃（Rhodendronsanctum）和山杜鹃（Rhodendronamagianum）的遗传多样性和种群遗传结构。对16个居群中的5个微卫星位点进行了分析。weyrichii，R. sanctum和6个居群。amagianum。正如预期的那样，等位基因丰富度和基因多样性所表示的遗传多样性水平较低的稀有物种R。对普通物种来说，韦里希尔。然而，在遗传多样性上，R. weyrichii和其他稀有种R. amagianum。隔离距离模式，邻居连接树，贝叶斯聚类分析表明，R。桑属具有较强的群体遗传结构，而R. amagipenda具有很弱的群体间遗传结构，R具有中等的群体遗传结构。韦里希尔。因此，每个物种的群体遗传结构的程度和模式与其稀有性无关，而仅仅反映了其地理分布。
Genetic diversity is essential for species to sustain their populations and evolutionary potential. In order to develop effective conservation strategies for rare species, it is necessary to understand differences in patterns of genetic diversity between common and rare species. Data about population genetic structure is important to design effective conservation strategies for rare species. In this study, we compared the genetic diversity and population genetic structure of a common species,Rhododendron weyrichii, to those of two rare species,Rhododendron sanctumandRhododendron amagianum, with different geographic distributions. We analyzed five microsatellite loci in 16 populations ofR. weyrichii, 9 populations ofR. sanctum, and 6 populations ofR. amagianum. As expected, the level of genetic diversity indicated by allelic richness and gene diversity was lower for the rare speciesR. sanctumthan for the common speciesR. weyrichii. However, there was no statistically significant difference in genetic diversity betweenR. weyrichiiand the other rare species,R. amagianum. Analyses of the isolation-by-distance pattern, neighbor-joining trees, and Bayesian clustering indicated thatR. sanctumhad a strong population genetic structure whereasR. amagianumexhibited very weak genetic structure among populations and that there was moderate population genetic structure forR. weyrichii. Therefore, the degree and pattern of population genetic structure in each species was unrelated to its rarity and instead merely reflected its geographic distribution.