Evolutionary origin of insect wings from ancestral gills
Evolutionary origin of insect wings from ancestral gills
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DOI：
10.1038/385627a0
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发表时间：
1997-02-13
期刊：
影响因子：
64.8
通讯作者：
Cohen, SM
中科院分区：
文献类型：
--
作者：
Averof, M;Cohen, SM
关于昆虫翅膀的起源，有两种假说。一种观点认为，翅膀是通过肢枝的变异进化而来的，肢枝已经存在于多分支的祖先附肢中，可能起着鳃的作用（1-5）。第二种观点认为，翅膀是体壁的新产物，与任何先前存在的肢体没有直接关系（6）。如果翅膀是从多分支附肢的背部结构衍生而来，我们预计它们的一些独特特征将建立在昆虫翅膀的结构祖先和其他节肢动物肢体的同源结构中已经存在的遗传功能上。我们已经分离出了两个在昆虫中具有翅膀特异功能的基因pdm（nubbin）和无翅的甲壳类同源物。它们的表达模式支持了这样一种假设，即昆虫翅膀是从鳃状附属物进化而来的，这些附属物已经存在于甲壳类动物和昆虫的水生祖先中。
Two hypotheses have been proposed for the origin of insect wings. One holds that wings evolved by modification of limb branches that were already present in multibranched ancestral appendages and probably functioned as gills(1-5). The second proposes that wings arose as novel outgrowths of the body wall, not directly related to any pre-existing limbs(6). If wings derive from dorsal structures of multibranched appendages, we expect that some of their distinctive features will have been built on genetic functions that were already present in the structural progenitors of insect wings, and in homologous structures of other arthropod Limbs. We have isolated crustacean homologues of two genes that have wing-specific functions in insects, pdm (nubbin) and apterous. Their expression patterns support the hypothesis that insect wings evolved from gill-like appendages that were already present in the aquatic ancestors of both crustaceans and insects.