PAEDOMORPHOSIS IN AMBYSTOMA TALPOIDEUM: MAINTENANCE OF POPULATION VARIATION AND ALTERNATIVE LIFE‐HISTORY PATHWAYS
PAEDOMORPHOSIS IN AMBYSTOMA TALPOIDEUM: MAINTENANCE OF POPULATION VARIATION AND ALTERNATIVE LIFE‐HISTORY PATHWAYS
复制标题
钝口螈的异态性：种群变异的维持和替代生活史途径
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
H. Wilbur
中科院分区：
文献类型：
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作者：
R. D. Semlitsch;R. Harris;H. Wilbur
一个“共同花园”的实验，使用人工池塘进行测试，如果在6个自然种群的蝾螈Ambystoma talpoideum之间的差异，Paedomorphosis和变态的频率导致干燥制度的水生栖息地作为一种选择剂。我们的实验支持种群之间变质倾向的遗传分化的假设，但提供了混合证据，即池塘干燥制度是指导这一性状进化的选择力。有些种群似乎已经进化出表型可塑性，而其他种群可能具有遗传多态性，在他们的倾向变质池塘干燥。
A “common garden” experiment using artifical ponds was performed to test if differences in frequency of paedomorphosis and metamorphosis among six natural populations of the salamander Ambystoma talpoideum resulted from the drying regime of the aquatic habitat acting as an agent of selection. Our experiment supports the hypothesis of genetic differentiation in the propensity to metamorphose among the populations, but gave mixed evidence that pond‐drying regime is the selective force directing evolution of this trait. Some populations appear to have evolved phenotypic plasticity whereas others may have a genetic polymorphism in their propensity to metamorphose as ponds dry.