Semlitsch Raymond D, Harris Reid N, Wilbur Henry M
Meeman Biological Field Station and Department of Biology, Memphis State University, Memphis, TN, 38152, USA.
Department of Zoology, Duke University, Durham, NC, 27706, USA.
Evolution. 1990 Sep;44(6):1604-1613. doi: 10.1111/j.1558-5646.1990.tb03849.x.
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.
利用人工池塘进行了一项“共同园圃”实验，以检验蝾螈（Ambystoma talpoideum）六个自然种群中幼态持续和变态频率的差异是否源于作为选择因素的水生栖息地干燥状况。我们的实验支持了种群间变态倾向存在遗传分化的假设，但对于池塘干燥状况是引导该性状进化的选择力这一点，证据并不一致。一些种群似乎进化出了表型可塑性，而其他种群在池塘干涸时变态倾向可能存在遗传多态性。
