Genetic variability in Irish populations of the invasive zebra mussel, Dreissena polymorpha: discordant estimates of population differentiation from allozymes and microsatellites
Genetic variability in Irish populations of the invasive zebra mussel, Dreissena polymorpha: discordant estimates of population differentiation from allozymes and microsatellites
复制标题
爱尔兰入侵斑马贻贝种群的遗传变异性：同种异型酶和微卫星对种群分化的不一致估计
DOI：
10.1111/j.1365-2427.2008.01965.x
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发表时间：
2008
影响因子：
2.7
通讯作者：
A. Wąs
中科院分区：
文献类型：
--
作者：
E. Gosling;Iulian Astanei;A. Wąs
摘要1.斑马贻贝Dreissena polymorpha（Pallas）最近到达并在爱尔兰爆炸性传播，为研究入侵物种的群体遗传学提供了难得的机会。2.利用ACO-1、ACO-2、EST-D、GPI、IDH-2、MDH、OPDH和PGM等8个多态性等位酶基因座对5个爱尔兰居群的遗传多样性和居群结构进行了研究，并将研究结果与微卫星分析结果进行了比较。3.每个基因座的平均等位基因数（2.7 ± 0.1）与欧洲人群中相同基因座的平均值相似，这表明爱尔兰创始人群体很大，并且在成立后发生了1/4或多个殖民事件。在所有的人群中观察到杂合子的缺陷，但不均匀的基因座。4.两两比较，使用Fisher精确检验和FST值，揭示了显着的遗传分化群体之间。总体多位点FST估计值为0.118 ± 0.045，与先前研究中相同样本的5个微卫星位点的估计值0.015 ± 0.007形成对比。5.假设微卫星可以作为中性基线，等位酶和微卫星的不一致结果表明，选择可能作用于一些等位酶位点，特别是ACO-1，ACO-2，IDH-2和MDH，这对样品之间的显着分化贡献最大。
SUMMARY 1. The recent arrival and explosive spread of the zebra mussel, Dreissena polymorpha (Pallas), in Ireland provided a rare opportunity to study the population genetics of an invasive species. 2. Eight polymorphic allozyme loci (ACO-1, ACO-2, EST-D, GPI, IDH-2, MDH, OPDH and PGM) were used to investigate genetic diversity and population structure in five Irish populations, and the results were compared with those from a previous microsatellite study on the same samples. 3. The mean number of alleles per locus (2.7 ± 0.1) was similar to the mean for the same loci in European populations, suggesting that Irish founder populations were large and ⁄or multiple colonization events took place after foundation. A deficiency of heterozygotes was observed in all populations, but was uneven across loci. 4. Pairwise comparisons, using Fisher’s exact tests and FST values, revealed significant genetic differentiation among populations. The overall multilocus FST estimate was 0.118 ± 0.045, which contrasted with an estimate of 0.015 ± 0.007 from five microsatellite loci on the same samples in a previous study. 5. Assuming that microsatellites can be used as a neutral baseline, the discordant results from allozymes and microsatellites suggest that selection may be acting on some allozyme loci, specifically ACO-1, ACO-2, IDH-2 and MDH, which contributed most to the significant differentiation between samples.
影响因子：
1.9
作者：
GUO, SW;THOMPSON, EA
通讯作者：
THOMPSON, EA