Docker Margaret F, Dale Angie, Heath Daniel D
Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, N9B 3P4, Canada.
Mol Ecol. 2003 Dec;12(12):3515-21. doi: 10.1046/j.1365-294x.2003.02000.x.
The frequency of hybridization between cutthroat (Onchorhynchus clarki clarki) and rainbow (O. mykiss irideus) trout from coastal habitats in British Columbia, Canada, was examined in seven populations where the two species are sympatric with no history of rainbow trout stocking and compared with areas where native rainbow trout populations have been supplemented with hatchery fish (three populations). Four nuclear markers were used to identify each species and interspecific hybrids and one mitochondrial marker showed the direction of gene exchange between species. The frequency of hybrids was significantly higher (Fisher exact test, P < 0.001) in river systems where hatchery rainbow trout have been introduced (50.6% hybrids) than in populations where the two species naturally co-occur without supplementation (9.9% hybrids).
对加拿大不列颠哥伦比亚省沿海栖息地的切喉鳟（Onchorhynchus clarki clarki）和虹鳟（O. mykiss irideus）之间的杂交频率进行了研究。在七个两种鱼同域分布且无虹鳟放流历史的种群中进行了检测，并与已用孵化场养殖的鱼补充本地虹鳟种群的区域（三个种群）进行了比较。使用四个核标记来识别每个物种和种间杂种，一个线粒体标记显示了物种间基因交换的方向。在引入孵化场虹鳟的河流系统中，杂种的频率显著更高（Fisher精确检验，P < 0.001）（杂种占50.6%），高于两种鱼自然共存且无补充的种群（杂种占9.9%）。
