Effectiveness of managed gene flow in reducing genetic divergence associated with captive breeding.

ABSTRACT: Captive breeding has the potential to rebuild depressed populations. However, associated genetic changes may decrease restoration success and negatively affect the adaptive potential of the entire population. Thus, approaches that minimize genetic risks should be tested in a comparative framework over multiple generations. Genetic diversity in two captive-reared lines of a species of conservation interest, Chinook salmon (Oncorhynchus tshawytscha), was surveyed across three generations using genome-wide approaches. Genetic divergence from the source population was minimal in an integrated line, which implemented managed gene flow by using only naturally-born adults as captive broodstock, but significant in a segregated line, which bred only captive-origin individuals. Estimates of effectiv

SUBMITTER: Waters CD 

PROVIDER: S-EPMC4662342 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature