Genetics of reintroduced populations of the narrowly endemic thistle, Cirsium pitcheri (Asteraceae)1
Genetics of reintroduced populations of the narrowly endemic thistle, Cirsium pitcheri (Asteraceae)1
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DOI：
10.1139/cjb-2012-0232
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发表时间：
2013-01
期刊：
影响因子：
1.1
通讯作者：
J. Fant;A. Kramer;Eileen Sirkin;Kayri Havens
中科院分区：
文献类型：
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作者：
J. Fant;A. Kramer;Eileen Sirkin;Kayri Havens
任何重新引入的目的都是为了提供足够的遗传变异性，以缓冲不断变化的选择压力，并确保长期生存。到目前为止，很少有实证研究比较重新引入的植物种群和本地植物种群的遗传多样性水平。利用微卫星标记技术，对受威胁的蓟马Torrey和Gray的再引入种群和原生种群的遗传多样性进行了测定。我们发现，利用当地混合源成功地建立了遗传多样性显著高于本地种群的群体(P<；0.005)(重新引入种群的等位基因丰富度为3.39%，本地种群的等位基因丰度为1.84)。然而，重新引入的种群具有显著更高的近交系数(P<；0.002)(重新引入的种群和本地种群的FIS分别为0.405和0.213)，尽管有多个遗传创始人，种群规模相当于本地种群，并且具有正的增长率。这些结果可能是由于近亲繁殖..。
The aim of any reintroduction is to provide sufficient genetic variability to buffer against changing selection pressures and ensure long-term survival. To date, few empirical studies have compared levels of genetic diversity in reintroduced and native plant populations. Using microsatellite markers, we measured the genetic diversity within reintroduced and native populations of the threatened Cirsium pitcher (Eaton) Torrey and Gray. We found that the use of local mixed source was successful in establishing populations with significantly higher genetic diversity (P < 0.005) than the native populations (allelic richness is 3.39 in reintroduced and 1.84 in native populations). However, the reintroduced populations had significantly higher inbreeding coefficients (P < 0.002) (FIS is 0.405 and 0.213 in reintroduced and in native populations, respectively), despite having multiple genetic founders, population sizes equivalent to native populations and a positive growth rate. These results may be due to inbreed...