School of Biological Sciences, Bangor University, Bangor, LL57 2UW, UK.
Mol Ecol. 2012 Nov;21(21):5299-308. doi: 10.1111/j.1365-294X.2012.05737.x. Epub 2012 Oct 8.
We investigate extensive quantitative trait variation (dewlap hue, colour pattern, dorsum hue, body proportions and scalation) in the Martinique anole across eight transects representing nascent parapatric ecological speciation, nascent allopatric speciation and allopatric divergence without sufficient genetic structure to suggest speciation. Quantitative trait divergence can be extremely large between adjacent sets of populations, but with one exception that this is associated with difference in habitat rather than past allopatry. Nascent ecological speciation shows the greatest level of quantitative trait divergence across all character sets including those implicated in natural, as well as sexual selection. The sole example of nascent allopatric speciation is associated with fairly strong quantitative trait divergence among most character sets, but not the set most implicated in natural (rather than sexual) selection. The role of sexual selection in ecological speciation is discussed, both in terms of female choice with assortative mating and male-male competition with condition-dependant sexual signals.
我们调查了马提尼克岛蜥蜴在八个横断面上的广泛数量性状变异（垂肉颜色、颜色图案、背部颜色、身体比例和鳞片），这些横断面代表了初生的并系生态物种形成、初生的异域物种形成和异域分歧，没有足够的遗传结构表明物种形成。在相邻的种群之间，数量性状的差异可能非常大，但有一个例外，这与栖息地的差异而不是过去的异域有关。初生的生态物种形成在包括那些涉及自然选择和性选择的所有特征集中显示出最大的数量性状差异。唯一的初生异域物种形成的例子与大多数特征集之间相当大的数量性状差异有关，但与最涉及自然（而不是性）选择的特征集无关。本文讨论了性选择在生态物种形成中的作用，包括雌性选择与 assortative 交配和雄性竞争与条件依赖的性信号。
