Alternative models for the evolution of eyespots and of serial homology on lepidopteran wings
Alternative models for the evolution of eyespots and of serial homology on lepidopteran wings
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DOI：
10.1002/bies.20733
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发表时间：
2008-04-01
期刊：
影响因子：
4
通讯作者：
Monteiro, Antonia
中科院分区：
文献类型：
--
作者：
Monteiro, Antonia
序列同源性在生物设计中广泛存在，但这些重复结构的起源和个体化似乎因不同类型的序列同源物而异，并且仍然是一个有趣和令人兴奋的研究课题。在这里，我将重点放在装饰蛱蝶翅膀边缘的连续重复的眼点的进化上。在这个系统中，未解决的问题涉及到导致这些系列同系物出现的进化步骤以及它们各自的身份是如何进化的。我提出并讨论了两个备选假设。第一个建议，眼斑首先出现作为一排未分化的重复模块，一个每个翼室，后来成为个性化。这种个体化使得眼点在特定的翼舱中出现和消失，也使得眼点获得不同的形态。第二个假说提出，眼斑最初是作为个体化的单个单位或单位群出现的，随着进化的时间推移，它们被选入翅膀上的新隔间。我讨论了这些替代假设的优点，找到类比其他系统，并提出研究途径，在未来解决这些问题。
Serial homology is widespread in organismal design, but the origin and individuation of these repeated structures appears to differ with the different types of serial homologues, and remains an intriguing and exciting topic of research. Here I focus on the evolution of the serially repeated eyespots that decorate the margin of the wings of nymphalid butterflies. In this system, unresolved questions relate to the evolutionary steps that lead to the appearance of these serial homologues and how their separate identities evolved. I present and discuss two alternative hypotheses. The first proposes that eyespots first appeared as a row of undifferentiated repeated modules, one per wing compartment, that later become individuated. This individuation allowed eyespots to appear and disappear from specific wing compartments and also allowed eyespots to acquire different morphologies. The second hypothesis proposes that eyespots first appeared as individuated single units, or groups of units, that over evolutionary time were co-opted into new compartments on the wing. I discuss the merits of each of these alternate hypotheses by finding analogies to other systems and propose research avenues for addressing these issues in the future.