16Insect Evolutionary
نویسندگان
چکیده
Where divergent ecological adaptation also leads to assortative mating between populations, speciation is facilitated. We have extensively studied two examples from among the Lepidoptera, in which ecologically selected traits have pleiotropic effects on the mating system. Based on our understanding of mating behaviour and pleiotropy derived from these empirical examples, we here review pleiotropic effects in speciation and propose a classification depending on effects on the mating system. This classification helps us to interpret the way in which pleiotropy has led to assortative mating in nature, but will also, we hope, be of interest to theoreticians. Certain models of mating behaviour rarely considered in models of sympatric speciation seem to be those that are most empirically justifiable and also likely to be involved in speciation in the real world. We conclude that pleiotropy might be a rather more general route to speciation than previously supposed.
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