Reproductive isolation caused by colour pattern mimicry
Reproductive isolation caused by colour pattern mimicry
复制标题
DOI：
10.1038/35077075
复制
发表时间：
2001-05-17
期刊：
影响因子：
64.8
通讯作者：
Mallet, J
中科院分区：
文献类型：
--
作者：
Jiggins, CD;Naisbit, RE;Mallet, J
如果生态适应直接导致交配，则促进物种形成（1），但已知的自然例子很少。在这里，我们表明，颜色模式模仿的转变是至关重要的两种蝴蝶物种的起源。姐妹种Heliconius melpomene和Heliconius cydno最近分歧，模仿不同的模式类群，我们的实验表明，他们的模仿色也是重要的择偶。姐妹物种之间的分类交配意味着杂交在自然界中是罕见的，产生的少数杂交种是非模仿的，适应性差的中间体。因此，这种模仿性的转变导致了交配前和交配后的隔离。此外，从H. melpomene对H. cydno court与H. cydno比来自同域种群的更容易。这表明，在同域性中，选择性交配得到了加强。
Speciation is facilitated if ecological adaptation directly causes assortative mating(1), but few natural examples are known. Here we show that a shift in colour pattern mimicry was crucial in the origin of two butterfly species. The sister species Heliconius melpomene and Heliconius cydno recently diverged to mimic different model taxa, and our experiments show that their mimetic coloration is also important in choosing mates. Assortative mating between the sister species means that hybridization is rare in nature, and the few hybrids that are produced are nonmimetic, poorly adapted intermediates. Thus, the mimetic shift has caused both pre-mating and post-mating isolation. In addition, individuals from a population of H. melpomene allopatric to H. cydno court and mate with H. cydno more readily than those from a sympatric population. This suggests that assortative mating has been enhanced in sympatry.