Studies on the origin of exotic loaches and their impact on indigenous species

通过染色体观察、基因组大小估计以及线粒体和核DNA标记的序列分析，对采自日本及邻近地区的泥鳅进行了遗传特征分析。因此，日本市场样本与中国分布的样本在基因上相同或非常相似。由于本土泥鳅和外来泥鳅物种之间的人工种间杂交在雌性中表现出生育能力，日本野生种群中的遗传污染令人担忧。

Loaches collected in Japan and adjacent area were genetically characterized by chromosome observation, genome size estimation and sequence analyses of mitochondrial and nuclear DNA markers. As a result, Japanese market samples were genetically identical or very similar to those distributed in China. As artificial inter-specific hybrids between indigenous loach and exotic mud loach species exhibit fertility in females, genetic contamination is worried in Japanese wild populations.