A genetic evaluation of relatedness for broodstock management of captive, endangered Snake River sockeye salmon, Oncorhynchus nerka
A genetic evaluation of relatedness for broodstock management of captive, endangered Snake River sockeye salmon, Oncorhynchus nerka
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DOI：
10.1007/s10592-007-9466-0
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发表时间：
2008-12-01
影响因子：
2.2
通讯作者：
Flagg, Thomas
中科院分区：
文献类型：
--
作者：
Kozfkay, Christine C.;Campbell, Matthew R.;Flagg, Thomas
随着全世界面临濒危或灭绝的物种数量的增加，圈养亲鱼的使用越来越频繁。重建濒临灭绝的蛇河红鲑鱼（Oncorhynchus nerka）种群的努力已经持续了十多年，但利用微卫星数据开发避免近亲繁殖的矩阵是该计划的一个较新的组成部分。本研究使用已知的系谱关系之间的红鲑鱼后代测试四个不同的成对相关性估计和最大似然（ML）相关性估计。本研究的目的是开发一种育种策略，这些估计，将尽量减少遗传多样性的损失，尽量减少近亲繁殖，并确定如何返回溯河产卵的成年人被纳入亲鱼沿着与足月孵化场成人。研究结果表明，M（xy）和R（QG）估计的第二类错误率最低，而M-L和R（R）估计的第一类错误率最低。一种方法，利用组合的估计可以提供最有价值的信息，为管理者。我们建议，M-L和R（R）的方法被用来排名返回成人和M（xy）或R（QG）估计的遗传重要性被用来确定哪些鱼配对产卵。这种方法为这一圈养濒危种群提供了最佳的遗传管理，并应普遍适用于其他没有谱系的濒危种群的遗传管理。
The use of captive broodstocks is becoming more frequently employed as the number of species facing endangerment or extinction throughout the world increases. Efforts to rebuild the endangered Snake River sockeye salmon, Oncorhynchus nerka, population have been ongoing for over a decade, but the use of microsatellite data to develop inbreeding avoidance matrices is a more recent component to the program. This study used known genealogical relationships among sockeye salmon offspring to test four different pairwise relatedness estimators and a maximum-likelihood (M-L) relatedness estimator. The goal of this study was to develop a breeding strategy with these estimators that would minimize the loss of genetic diversity, minimize inbreeding, and determine how returning anadromous adults are incorporated into the broodstock along with full-term hatchery adults. Results of this study indicated that both the M (xy) and R (QG) estimators had the lowest Type II error rates and the M-L and R (R) estimators had the lowest Type I error rates. An approach that utilizes a combination of estimators may provide the most valuable information for managers. We recommend that the M-L and R (R) methods be used to rank the genetic importance of returning adults and the M (xy) or R (QG) estimators be used to determine which fish to pair for spawning. This approach provides for the best genetic management of this captive, endangered population and should be generally applicable to the genetic management of other endangered stocks with no pedigree.