Fruit odor discrimination and sympatric host race formation in Rhagoletis
Fruit odor discrimination and sympatric host race formation in Rhagoletis
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DOI：
10.1073/pnas.1635049100
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发表时间：
2003-09-30
影响因子：
11.1
通讯作者：
Roelofs, W
中科院分区：
文献类型：
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作者：
Linn, C;Feder, JL;Roelofs, W
Rhagoletis pomonella 是通过寄主植物转移进行早期同域物种形成（没有地理隔离的分化）的模型。在这里，我们表明历史上衍生的苹果和祖先山楂感染的果蝇宿主种族使用水果气味作为关键的嗅觉线索来帮助区分各自的植物。在飞行隧道分析和田间测试中，苹果蝇和山楂蝇优先针对其出生果实挥发物的化学混合物，并用其捕获。由于苹果蝇会在宿主未脱落的果实上或附近交配，对苹果与山楂果实气味的行为偏好直接转化为果蝇种族之间交配前的生殖隔离。因此，我们确定了一个关键并且最近演变（
Rhagoletis pomonella is a model for incipient sympatric speciation (divergence without geographic isolation) by host-plant shifts. Here, we show that historically derived apple- and ancestral hawthorn-infesting host races of the fly use fruit odor as a key olfactory cue to help distinguish between their respective plants. in flight-tunnel assays and field tests, apple and hawthorn flies preferentially oriented to, and were captured with, chemical blends of their natal fruit volatiles. Because R. pomonella rendezvous on or near the unabscised fruit of their hosts to mate, the behavioral preference for apple vs. hawthorn fruit odor translates directly into premating reproductive isolation between the fly races. We have therefore identified a key and recently evolved (