STRONG NATURAL-SELECTION IN A WARNING-COLOR HYBRID ZONE
STRONG NATURAL-SELECTION IN A WARNING-COLOR HYBRID ZONE
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DOI：
10.1111/j.1558-5646.1989.tb04237.x
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发表时间：
1989-03-01
期刊：
影响因子：
3.3
通讯作者：
BARTON, NH
中科院分区：
文献类型：
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作者：
MALLET, J;BARTON, NH
对警示颜色的频率依赖选择可以在令人不快的猎物类群之间保持狭窄的杂交区。为了衡量这种选择，我们在秘鲁不同颜色模式的种族之间，在一个10公里宽的杂交带上，双向转移了标记为Helconius Erato(鳞翅目：若蝇科)的赫利柯斯·埃拉托(Helconius Erato)。这些实验的H.Erato在四个地点被释放，以及每个地点原生的表型的对照H.Erato。在两个地点和总体上，实验蝴蝶的存活率明显低于对照蝴蝶。大多数选择，以生存差异衡量，发生在释放后不久。对外来变种的选择性为52%(置信限：25-71%)，可能是由于鸟类对不寻常的警示颜色变种的攻击(超过10%的重新捕获有喙痕迹)。由于只有三个主基因座决定了颜色模式的差异，这表明每个基因座的平均选择系数为0.17，足以维持白纹伊拉托的窄斜交。
Frequency-dependent selection on warning color can maintain narrow hybrid zones between unpalatable prey taxa. To measure such selection, we transferred marked Heliconius erato (Lepidoptera: Nymphalidae) in both directions across a 10-km-wide hybrid zone between Peruvian races differing in color pattern. These experimental H. erato were released at four sites,along with control H. erato of the phenotype native to each site. Survival of experimental butterflies was significantly lower than that of controls at two sites and overall. Most selection, measured as differences in survival, occurred soon after release. Selection against foreign morphs was 52% (confidence limits: 25-71%) and was probably due to bird attacks on unusual warning-color morphs (more than 10% of the recaptures had beak marks). Since only three major loci determine the color-pattern differences, this suggests an average selection coefficient of 0.17 per locus, sufficient to maintain the narrow clines in H. erato.