Trial to detect genomic footprints of local and domestic adaptation in Ayu populations

利用多种分子标记对日本、中国和朝鲜半岛的野生种群和孵化场种群进行了调查，建立了保护单位，检测了野生种群和家养适应种群的基因组足迹。从线粒体DNA序列数据推断，亚种之间的分歧时间是100万年前，而当地种群之间的分歧时间是70000-150000年前。根据这一结果和其他DNA数据，我们提出了保护阿育群体遗传多样性的重要单位。孵化群体遗传多样性与世代数呈显著负相关。这一结果将归因于圈养种群的遗传漂移和/或对养殖条件的适应。不幸的是，基因组扫描不能检测到表明野生种群和孵化场种群适应的离群点。

To set conservation units and to detect genomic footprints of local and domestic adaptation in Ayu populations, wild and hatchery populations collected from Japan, China, and Korean Peninsula were investigated by a multitude DNA markers. Inferred from mitochondrial DNA sequence data, estimating divergence times between subspecies was 1 million years ago and those among local populations were 70000-150000 years ago. Based on this results and other DNA data, we proposed significant units to conserve genetic diversity of Ayu populations. The relationships between genetic diversities and number of successive generation in the hatchery populations showed apparently negative correlation. This results would be attributed to genetic drift and/or adaptation of the captive stocks to the culture condition. Unfortunately, genome scan could not detect outlier locus indicating adaptation in wild and hatchery populations.