Unravelling first-generation pedigrees in wild endangered salmon populations using molecular genetic markers
Unravelling first-generation pedigrees in wild endangered salmon populations using molecular genetic markers
复制标题
DOI：
10.1111/j.1365-294x.2006.02923.x
复制
发表时间：
2006-07-01
影响因子：
4.9
通讯作者：
Verspoor, E. .
中科院分区：
文献类型：
--
作者：
Herbinger, C. M.;O'Reilly, P. T.;Verspoor, E. .
在缺乏亲本信息的情况下，利用分子遗传数据来推断个体之间的系谱关系越来越受到关注。这样的分析可以提供深入了解交配系统和估计遗传力在野外。此外，在圈养的濒危种群的建立者之间进行精确的谱系重建将是非常宝贵的。许多濒危物种的育种计划试图通过旨在最大限度地减少全球共同祖先的策略来最大限度地减少遗传变异和近亲繁殖的损失，但他们假设创始人之间缺乏相关性。然而，这些计划的目标人群通常都在严重的人口下降，许多可用的创始人可能是密切相关的。在这里，我们展示了一个圈养繁殖计划，涉及两个濒危大西洋鲑鱼种群使用两种不同的方法和相关的软件，血统和殖民地的野生创始人之间的全同胞和半同胞关系的决心。在这两条河流中收集的大部分幼鱼似乎来自于令人惊讶的少数雌性与大量雄性交配，可能是早熟的小幼鱼。另一组潜在的创始人，从当地孵化场获得，显然来自少量的全同胞杂交。这些结果使我们能够根据保护价值对个体进行优先排序，并有望帮助最大限度地减少遗传变异的损失。此外，深入了解的贡献父母和交配系统，产生了这最后一代濒危野生大西洋鲑鱼的数量。
There is increasing interest in the use of molecular genetic data to infer genealogical relationships among individuals in the absence of parental information. Such analyses can provide insight into mating systems and estimations of heritability in the wild. In addition, accurate pedigree reconstruction among the founders of endangered populations being reared in captivity would be invaluable. Many breeding programs for endangered species attempt to minimize loss of genetic variation and inbreeding through strategies designed to minimize global co-ancestry, but they assume a lack of relatedness among the founders. Yet populations that are the target of such programs are generally in serious demographic decline, and many of the available founders may be closely related. Here we demonstrate determination of full and half-sib relationships among the wild founders of a captive breeding program involving two endangered Atlantic salmon populations using two different approaches and associated software, PEDIGREE and COLONY. A large portion of the juveniles collected in these two rivers appear to be derived from surprisingly few females mating with a large number of males, probably small precocious parr. Another group of potential founders, obtained from a local hatchery, clearly originated from a small number of full-sib crosses. These results allowed us to prioritize individuals on the basis of conservation value, and are expected to help minimize loss of genetic variation through time. In addition, insight is provided into the number of contributing parents and the mating systems that produced this last generation of endangered wild Atlantic salmon.