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What initiates speciation in passion-vine butterflies?

机译:是什么引起西番莲蝴蝶的物种形成?

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摘要

Studies of the continuum between geo- graphic races and species provide the clearest insights into the causes of speciation. Here we report on mate choice and hybrid viability experiments in a pair of warningly colored butter- flies, Heliconius erato and Heliconius himera, that maintain their genetic integrity in the face of hybridization. Hybrid sterility and inviability have been unimportant in the early stages of speciation of these two Heliconius. We find no evidence of reduced fecundity, egg hatch, or larval survival nor increases in developmental time in three generations of hybrid crosses. Instead, speciation in this pair appears to have been catalyzed by the association of strong mating preferences with divergence in warning coloration and ecology.
机译:对地理种族和物种之间连续性的研究提供了最清楚的物种形成原因的见解。在这里,我们报告了在一对带有警告颜色的蝴蝶Heliconius erato和Heliconius himera中进行配偶选择和杂交活力的实验,它们在杂交时仍能保持其遗传完整性。在这两个Heliconius物种形成的早期阶段,杂种不育性和不育性并不重要。我们没有发现降低繁殖力,卵孵化或幼虫存活的证据,也没有在三代杂交杂交中增加发育时间的证据。取而代之的是,这对物种的形成似乎是由于强烈的交配偏好与警告色和生态学差异之间的联系而引起的。

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