Associations between Mitochondrial and Nuclear Genotypes in Cutthroate Trout Hybrid Swarms
Forbes SH and Allendorf FW. 1991. Associations between Mitochondrial and Nuclear Genotypes in Cutthroate Trout Hybrid Swarms. Evolution. 45(6):1332-1349
We examined mtDNA and nuclear allozyme genotypes in hybrid populations formed from interbreeding of westslope cutthroat trout (Oncorhynchus clarki lewisi ) and Yellowstone cutthroat trout (O. c. bouvieri ). These subspecies show substantial genetic divergence (Nei's D = 0.30; mtDNA P = 0.02). Diagnostic alleles at multiple nuclear loci and two distinct mtDNA haplotypes segregate in the hybrids. Nuclear and mtDNA genotypes are largely randomly associated, although there is slight disequilibrium in both nuclear and cytonuclear measures in some samples. Consistent positive gametic disequilibria for three pairs of nuclear loci confirm one previously reported linkage, and indicate two more.
- Type
- Journal Article
- Authors
- Forbes, S; Allendorf, F
- Units
- YELL
- Keywords
- Animal Studies, DNA, Fish, Westslope Cutthroat Trout (Oncorhynchus clarki lewisi), Yellowstone Cutthroat Trout (Oncorhynchus clarki bouvieri)