Parallel evolution of behaviour during independent host-shifts following maize introduction into Asia and Europe.
Parallel evolution of behaviour during independent host-shifts following maize introduction into Asia and Europe.
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DOI：
10.1111/eva.12481
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发表时间：
2017-10
影响因子：
4.1
通讯作者：
Bourguet D
中科院分区：
文献类型：
--
作者：
Calcagno V;Mitoyen C;Audiot P;Ponsard S;Gao GZ;Lu ZZ;Wang ZY;He KL;Bourguet D
500年前，玉米被引入欧亚大陆的两侧，西欧和亚洲。这导致了植食性玉米螟属的两次宿主转移;欧洲玉米螟（欧洲玉米螟; ECB）和亚洲玉米螟（亚洲玉米螟; ACB）现在是全球玉米的主要害虫。它们独立起源于双子叶植物的祖先，类似于O. scapulalis（红小豆螟; ABB）。与其他宿主植物不同，玉米每年收获一次，收获实践对在截止线以上发现的幼虫造成严重死亡。ECB中的正趋地性被认为是对收获实践的行为适应，允许幼虫移动到截止线以下，从而逃避收获死亡。在这里，我们测试是否相同的行为适应独立地在欧洲和亚洲。我们在法国和中国采样了8个遗传分化的ECB、ACB和ABB种群，并在模仿玉米茎的人工堆中监测了整个幼虫发育过程中的趋地性。我们发现，所有欧洲央行和ACB人口显示出类似的趋势，在最新的幼虫阶段，在任何欧洲或亚洲ABB人口没有观察到的行为。无论幼虫密度、发育模式或环境条件如何，该行为都得到了有力的表达。我们的研究结果表明，玉米引进引发了欧洲和亚洲的平行行为适应，收获选择可能是主要的驱动力。
Maize was introduced into opposite sides of Eurasia 500 years ago, in Western Europe and in Asia. This caused two host‐shifts in the phytophagous genus Ostrinia; O. nubilalis (the European corn borer; ECB) and O. furnacalis (the Asian corn borer; ACB) are now major pests of maize worldwide. They originated independently from Dicot‐feeding ancestors, similar to O. scapulalis (the Adzuki bean borer; ABB). Unlike other host‐plants, maize is yearly harvested, and harvesting practices impose severe mortality on larvae found above the cut‐off line. Positive geotaxis in the ECB has been proposed as a behavioural adaptation to harvesting practices, allowing larvae to move below the cut‐off line and thus escape harvest mortality. Here, we test whether the same behavioural adaptation evolved independently in Europe and in Asia. We sampled eight genetically differentiated ECB, ACB and ABB populations in France and China and monitored geotaxis through the entire larval development in artificial stacks mimicking maize stems. We find that all ECB and ACB populations show a similar tendency to move down during the latest larval stages, a behaviour not observed in any European or Asian ABB population. The behaviour is robustly expressed regardless of larval density, development mode or environmental conditions. Our results indicate that maize introduction triggered parallel behavioural adaptations in Europe and Asia, harvest selection presumably being the main driver.
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影响因子：
3.8
作者：
Bethenod, MT;Thomas, Y;Bourguet, D
通讯作者：
Bourguet, D
影响因子：
1.9
作者：
Ishikawa, Y;Takanashi, T;Huang, YP
通讯作者：
Huang, YP
影响因子：
1.7
作者：
Knolhoff, L. M.;Onstad, D. W.;Levine, E.
通讯作者：
Levine, E.
影响因子：
4.1
作者：
Fray, Lucy M.;Leather, Simon R.;Lind, Robert J.
通讯作者：
Lind, Robert J.
DOI：
10.1098/rspb.2010.0433
发表时间：
2010-09-07
影响因子：
4.7
作者：
Calcagno, Vincent;Bonhomme, Vincent;Bourguet, Denis
通讯作者：
Bourguet, Denis