Heterosis and outbreeding depression: A multi-locus model and an application to salmon production

Fisheries Research
By:

Links

Abstract

Both artificial propagation and efforts to preserve or augment natural populations sometimes involve, wittingly or unwittingly, the mixing of different gene pools. The advantages of such mixing vis-à-vis the alleviation of inbreeding depression are well known. Acknowledged, but less well understood, are the complications posed by outbreeding depression. This paper derives a simple model of outbreeding depression and demonstrates that it is reasonably possible to predict the generation-to-generation fitness course of hybrids derived from parents from different origins. Genetic difference, or distance between parental types, is defined by the drop in fitness experienced by one type reared at the site to which the other is locally adapted. For situations where decisions involving stock mixing must be made in the absence of complete information, a sensitivity analysis-based conflict resolution method (the Good-Bad-Ugly model) is described.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Heterosis and outbreeding depression: A multi-locus model and an application to salmon production
Series title Fisheries Research
DOI 10.1016/0165-7836(91)90095-W
Volume 12
Issue 3
Year Published 1991
Language English
Publisher Elsevier
Contributing office(s) Western Fisheries Research Center
Description 31 p.
First page 187
Last page 212