Correlated phenotypic responses to habitat difference in Cepaea nemoralis (L.)
Correlated phenotypic responses to habitat difference in Cepaea nemoralis (L.)
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Cepaea nemoralis (L.)生境差异的相关表型反应
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
L. Cook
中科院分区：
文献类型：
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作者：
R. Cameron;L. Cook
利用来自Evolution Megalab项目的数据，Cepaea nemoralis（L.）分别来自林地和开阔地，在不同的多态位点上对生境差异的联合响应进行了研究。在整个物种的范围内，有一种趋势，开放的栖息地样本有不同的频率在壳的颜色和图案位点，从那些在邻近的树林。在英国，开阔栖息地的黄色频率高于树木栖息地的可能性约为67%。在连锁条带位点，它们的黄色频率较高且未条带频率较低的可能性为41%。然而，未显带和未连锁的中间显带位点的反应在很大程度上是独立的。开放栖息地的黄色更高，未带状和中间带状（有效未带状）的总和值更低的可能性为42%，而开放栖息地样本更黄，更少未带状和更少中间带状的可能性不超过19%.The颜色，但不是带状差异也发现在欧洲大陆的数据。栖息地的影响在多态系统中起作用。在英国，紧密分布的样本对在三个地点的栖息地之间的平均频率差（欧几里得距离）约为0.26。由于其他因素影响的多态性，这种差异增加到0.43对1公里以外和0.59在10公里以外。这些结果扩展了凯恩和谢泼德（1954）和其他人的原始发现，但清楚地表明，栖息地只是解释Cepaea多态性的一部分。
Using data from the Evolution Megalab Project paired samples of Cepaea nemoralis (L.) coming respectively from woodland and open habitats have been examined for joint response to habitat difference at different polymorphic loci. Throughout the range of the species there is a tendency for open habitat samples to have different frequencies at shell colour and pattern loci from those in neighbouring woods. In Britain, the chance that the frequency of yellow is higher in open than in wooded habitats is about 67 per cent. There is a 41 per cent chance that they will have both higher frequency of yellow and a lower frequency of unbanded at the linked banding locus. Responses of unbanded and the unlinked mid-banded locus are to a large extent independent, however. The chance that open habitats have higher yellow and a lower value for the sum of unbanded and mid-banded (effectively unbanded) is 42 per cent, while the chance that the open habitat sample is more yellow, less unbanded and less mid-banded is no more than 19 per cent. The colour, but not the banding difference was also found in the data for continental Europe. The effect of habitat acts within a polymorphic system. For Britain closely spaced sample pairs have an average frequency difference (Euclidean distance) between habitats at the three loci of about 0.26. As a result of other factors affecting the polymorphism this difference increases to 0.43 for pairs 1 km apart and 0.59 at 10 km apart. These results extend the original findings of CAIN & SHEPPARD (1954) and others but show clearly that the habitat is only part of the explanation for polymorphism in Cepaea.