Confirmation of genetic pollution of alien Chinese giant salamander on native Japanese species

此前的调查显示，在京都的卡莫川，本地日本大鲵通过与外来中国大鲵杂交而受到基因污染。为了更深入地了解这一问题，我们开发了新的微卫星标记，使基因分型更容易，更准确。通过对卡莫河和其他河流系统的实地调查，明确了基因污染正在迅速发展。本地蝾螈可能已经在卡莫河中灭绝，而在与卡莫河不同的河流系统中的卡米-卡莫河中，杂交正在变得流行。通过与外来物种杂交或由此产生的杂交而对本地物种造成的遗传污染比预期的要广泛得多。迫切需要找到一些方法来保护孤立条件下的本地物种。

Previous survey revealed that native Japanese giant salamander is genetically polluted through hybridization with alien Chinese salamanders in the Kamo River, Kyoto. In order to understand the matter more closely, we developed new microsatellite markers to make genotyping easier and more correctly. As a result of field survey in the Kamo River and other river systems, it is clarified that genetic pollution is rapidly in progress. Native salamanders might have extinguished in the Kamo River, and hybridization is becoming popular in the Kami-Katsura River in a river system different from the Kamo River. Genetic pollution of native species through hybridization of alien species or resultant hybrids is much more spread than is expected. It is urgently required to find out some way to conserve native species in isolated conditions.