EB Ford revisited: assessing the long-term stability of wing-spot patterns and population genetic structure of the meadow brown butterfly on the Isles of Scilly.
EB Ford revisited: assessing the long-term stability of wing-spot patterns and population genetic structure of the meadow brown butterfly on the Isles of Scilly.
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DOI：
10.1038/hdy.2016.94
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发表时间：
2017-04
期刊：
影响因子：
3.8
通讯作者：
Hosken DJ
中科院分区：
文献类型：
--
作者：
Baxter SW;Hoffman JI;Tregenza T;Wedell N;Hosken DJ
理解自然选择仍然是进化生态学的一个主要目标，福特和同事们在草地棕色蝴蝶Maniola jurtina上的工作为点燃这一议程做了很多工作。他们的大量工作是在20世纪50年代在锡利群岛进行的。他们记录了岛屿特有的翅斑模式，这些模式在大约十年的时间里保持一致，但一些岛屿的模式在环境扰动后发生了变化。有人认为，这些翅斑模式反映了岛屿特有的选择，岛屿之间的迁移很少。然而，缺乏遗传学研究来测试限制迁徙的基本假设，也不知道最初描述的翅斑模式是否会随着时间的推移而持续存在。因此，我们从福特最初研究的五个地点收集了雌性蝴蝶，包括三个大岛（圣玛丽岛、圣马丁岛和特雷斯科岛）和两个小岛（坦岛和圣海伦岛）。其中三个岛屿（两大一小）的翼点模式没有随时间发生明显变化，但在其他两个岛屿上却有显著差异。此外，176个扩增片段长度多态性的分析揭示了显着的全基因组分化之间的五个岛屿。我们的发现与福特的结论一致，即尽管这些岛屿非常接近，但它们之间的基因流动受到限制。
Understanding selection in the wild remains a major aim of evolutionary ecology and work by Ford and colleagues on the meadow brown butterfly Maniola jurtina did much to ignite this agenda. A great deal of their work was conducted during the 1950s on the Isles of Scilly. They documented island-specific wing-spot patterns that remained consistent over about a decade, but patterns on some islands changed after environmental perturbation. It was suggested that these wing-spot patterns reflected island-specific selection and that there was little migration between islands. However, genetic studies to test the underlying assumption of restricted migration are lacking and it is also unknown whether the originally described wing-spot patterns have persisted over time. We therefore collected female butterflies from five of Ford's original study locations, including three large islands (St Mary's, St Martin's and Tresco) and two small islands (Tean and St Helen's). Wing-spot patterns had not changed appreciably over time on three of the islands (two large and one small), but were significantly different on the other two. Furthermore, analysis of 176 amplified fragment length polymorphisms revealed significant genome-wide differentiation among the five islands. Our findings are consistent with Ford's conclusions that despite the close proximity of these islands, there is restricted gene flow among them.