Date of Award
2012
Publication Type
Master Thesis
Degree Name
M.Sc.
Department
Great Lakes Institute for Environmental Research
Keywords
Biological sciences, Oncorhynchus tshawytscha, Conservation, Genetic load, Inbreeding, Inbreeding depression, Purging, Salmon
Supervisor
Daniel D. Heath
Rights
info:eu-repo/semantics/openAccess
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Abstract
Strong evidence that shows inbreeding in many plants and animals can lead to detrimental effects at the level of the organism as well as the population. Inbreeding and its effects have been the focus of much attention in terms of conservation and captive rearing and breeding programs for many endangered species. Inbreeding depression (ID) is the fitness loss associated with individuals and populations that have experienced inbreeding. Surprisingly, ID studies within salmonids are not extensive. Here, I used inbred offspring of self-fertilized hermaphrodite parents to study the effects of ID in Chinook salmon ( Oncorhynchus tshawytscha ) at an extreme level of inbreeding. High levels of ID were found after a single generation of self-crossing, resulting in substantial fitness losses. The potential to purge genetic load from a population was shown to take place and the major genetic mechanism driving ID was due to expression of deleterious recessive alleles.
Recommended Citation
Komsa, Kendra, "Inbreeding depression and segregation distortion in Chinook salmon: Conservation implications of genetic load" (2012). Electronic Theses and Dissertations. 4821.
https://scholar.uwindsor.ca/etd/4821