斯洛文尼亚大理石鳟（Salmo marmoratus）残余种群间的极端遗传分化。

Extreme genetic differentiation among the remnant populations of marble trout (Salmo marmoratus) in Slovenia.

作者信息

Fumagalli L, Snoj A, Jesensek D, Balloux F, Jug T, Duron O, Brossier F, Crivelli A J, Berrebi P

机构信息

Institut d'Ecologie, Laboratoire de Biologie de la Conservation, Bâtiment de Biologie, 1015 Lausanne, Switzerland.

出版信息

Mol Ecol. 2002 Dec;11(12):2711-6. doi: 10.1046/j.1365-294x.2002.01648.x.

DOI:10.1046/j.1365-294x.2002.01648.x

PMID:12453253

Abstract

Populations of the marble trout (Salmo marmoratus) have declined critically due to introgression by brown trout (Salmo trutta) strains. In order to define strategies for long-term conservation, we examined the genetic structure of the 8 known pure populations using 15 microsatellite loci. The analyses reveal extraordinarily strong genetic differentiation among populations separated by < 15 km, and extremely low levels of intrapopulation genetic variability. As natural recolonization seems highly unlikely, appropriate management and conservation strategies should comprise the reintroduction of pure populations from mixed stocks (translocation) to avoid further loss of genetic diversity.

摘要

由于褐鳟（Salmo trutta）品系的基因渗入，大理石鳟（Salmo marmoratus）的种群数量已急剧下降。为了确定长期保护策略，我们使用15个微卫星位点研究了8个已知纯种群体的遗传结构。分析结果显示，相距不到15公里的群体之间存在异常强烈的遗传分化，而群体内部的遗传变异性极低。由于自然重新定殖的可能性似乎极小，合适的管理和保护策略应包括从混合种群中重新引入纯种群体（迁移），以避免遗传多样性的进一步丧失。