Genetic assessment of spatiotemporal evolutionary relationships and stocking effects in grayling (Thymallus thymallus, Salmonidae)
Genetic assessment of spatiotemporal evolutionary relationships and stocking effects in grayling (Thymallus thymallus, Salmonidae)
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河鳟时空进化关系和放养效应的遗传评估（Thymallus thymallus，鲑鱼科）
DOI：
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
C. Primmer
中科院分区：
文献类型：
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作者：
M. Koskinen;Pekka Sundell;J. Piironen;C. Primmer
国内饲养的引进（或逃逸）个体可能对它们被释放到的土著人口产生有害的遗传影响。因此，许多研究试图估计非本地标本是否有助于野生种群的基因库。到目前为止，这些研究的关键限制因素是缺乏适当的基线遗传物质。在这里，微卫星DNA分析的历史规模的样本和当代野生和引进的人口被用来评估时空的人口结构和放养濒危塞马湖（芬兰东部）之间的影响（Thymallus thymallus，鲑科）。自1986年开始放养以来，野生和引进种群之间的遗传分化显着下降。因此，高达15%的当代野生灰鲭被确定为纯孵化场的起源，最近的孵化场和土著个体之间的杂交出现可能。尽管有这些明确的放养遗传印记，当代人群表现出与采样地点一致的进化关系，高达73%的当代个体被确定为纯土著血统。历史基线材料的使用应证明对监测其他物种（如鲑鱼、狩猎动物和植物）的驯化种群和野生种群之间的基因流动是有效的。
Domestically reared introduced (or escaped) individuals can have detrimental genetic effects on the indigenous populations into which they are released. Consequently, numerous studies have attempted to estimate whether non-native specimens have contributed to the gene pool of wild populations. So far, the key limiting factor of such studies has been their lack of appropriate baseline genetic material. Here, microsatellite DNA analyses of historical scale samples and contemporary wild and introduced populations were used to assess spatiotemporal population structure and stocking effects among endangered Lake Saimaa (eastern Finland) grayling (Thymallus thymallus, Salmonidae). Significant decreases in genetic differentiation were detected between wild and introduced populations since the commencement of stocking in 1986. Accordingly, up to 15% of the contemporary wild grayling were confidently identified to be of pure hatchery origin, and recent hybridization between the hatchery and indigenous individuals appeared likely. Despite these clear genetic imprints of stocking, the contemporary populations exhibited evolutionary relationships congruent with the sampling locations, and up to 73% of contemporary individuals were identified to be of pure indigenous origin. The use of historical baseline material should prove efficient for monitoring gene flow between domesticated and wild populations in other species also, e.g. salmonids, game animals and plants.
DOI：
10.1073/pnas.94.17.9197
发表时间：
1997-08-19
影响因子：
11.1
作者：
Rannala, B;Mountain, JL
通讯作者：
Mountain, JL