Population genetic structure and comparative diversity of smallmouth bass Micropterus dolomieu: congruent patterns from two genomes.

Autor: Stepien CA; Great Lakes Genetics/Genomics Laboratory, Department of Environmental Sciences, University of Toledo, Toledo, OH, 43606, U.S.A.; NOAA Pacific Marine Environmental Laboratory (PMEL), 7600 Sand Point Way NE, Seattle, WA, 98115, U.S.A., Karsiotis SI; Great Lakes Genetics/Genomics Laboratory, Department of Environmental Sciences, University of Toledo, Toledo, OH, 43606, U.S.A., Sullivan TJ; Great Lakes Genetics/Genomics Laboratory, Department of Environmental Sciences, University of Toledo, Toledo, OH, 43606, U.S.A., Klymus KE; Great Lakes Genetics/Genomics Laboratory, Department of Environmental Sciences, University of Toledo, Toledo, OH, 43606, U.S.A.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2017 May; Vol. 90 (5), pp. 2125-2147. Date of Electronic Publication: 2017 Mar 21.
DOI: 10.1111/jfb.13296
Abstrakt: Genetic diversity and divergence patterns of smallmouth bass Micropterus dolomieu spawning groups are analysed across its northern native range with mtDNA cytochrome b gene sequences and eight unlinked nuclear DNA microsatellite loci. Results reveal high levels of genetic variability and significant differences in allelic representation among populations (mtDNA: mean ± s.e., H D = 0·50 ± 0·06, mean ± s.e., θ ST = 0·41 ± 0·02 and microsatellites: mean ± s.e. H O = 0·46 ± 0·03, mean ± s.e. θ ST = 0·25 ± 0·01). The distributions of 28 variant mtDNA haplotypes, which differ by an average of 3·94 nucleotides (range = 1-8), denote divergent representation among geographic areas. Microsatellite data support nine primary population groups, whose high self-assignment probabilities likewise display marked divergence. Genetic patterns demonstrate: (1) high genetic diversity in both genomes, (2) significant divergence among populations, probably resulting from natal site homing and low lifetime migration, (3) support for three post-glacial refugia that variously contributed to the current northern populations, which remain evident today despite waterway connectivity and (4) a weak yet significant genetic isolation by geographic distance pattern, indicating that other processes affect the differences among populations, such as territoriality and site fidelity.
(© 2017 The Fisheries Society of the British Isles.)
Databáze: MEDLINE
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