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Titolo:
Mitochondrial DNA phylogeography of lake cisco (Coregonus artedi): evidence supporting extensive secondary contacts between two glacial races
Autore:
Turgeon, J; Bernatchez, L;
Indirizzi:
Univ Laval, Dept Biol, GIROQ, St Foy, PQ G1K 7P4, Canada Univ Laval St Foy PQ Canada G1K 7P4 ol, GIROQ, St Foy, PQ G1K 7P4, Canada
Titolo Testata:
MOLECULAR ECOLOGY
fascicolo: 4, volume: 10, anno: 2001,
pagine: 987 - 1001
SICI:
0962-1083(200104)10:4<987:MDPOLC>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHARR SALVELINUS-FONTINALIS; MACKENZIE RIVER BASIN; FRESH-WATER FISHES; WHITEFISH COREGONUS; POSTGLACIAL DISPERSAL; RESTRICTION ANALYSIS; CONTROL-REGION; NORTH-AMERICA; REPRODUCTIVE ISOLATION; EVOLUTIONARY HISTORY;
Keywords:
Coregonus artedi; colonization; dispersal; ecotype; refuge; mtDNA; phylogeography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
67
Recensione:
Indirizzi per estratti:
Indirizzo: Turgeon, J Dartmouth Coll, Dept Biol, Hanover, NH 03755 USA Dartmouth Coll Hanover NH USA 03755 iol, Hanover, NH 03755 USA
Citazione:
J. Turgeon e L. Bernatchez, "Mitochondrial DNA phylogeography of lake cisco (Coregonus artedi): evidence supporting extensive secondary contacts between two glacial races", MOL ECOL, 10(4), 2001, pp. 987-1001

Abstract

The comparative molecular phylogeography of regional fish fauna has revealed the wide distribution of young clades in freshwater fishes of formerly glaciated areas as well as interspecific incongruences in their refugial origins and recolonization routes. In this study, we employed single-strand conformation polymorphism (SSCP) and sequence analyses to describe mitochondrial DNA (mtDNA) polymorphism among 27 populations of the lake cisco (Coregonus artedi) from its entire range of distribution in order to evaluate the hypothesis of dual glacial refuges proposed by Bernatchez & Dodson against the traditional view that this species is solely of Mississippian origin. Results indicate that this taxon is composed of two closely related groups that are widely distributed and intermixed over most of the sampled range. The estimated level of divergence (0.48%), the contrast in the geographical distribution of each group, as well. as the general distribution of C. artedi in North America together support the hypothesis that one group dispersed from a Mississippian refuge via the proglacial lakes, while the other is of Atlantic origin and also took advantages of earlier dispersal routes towards eastern Hudson Bay drainages. However; the signal of past range fragmentation revealed by a nested clade analysis was weak, and did not allow to formally exclude the hypothesis of a single Mississippian origin for both lineages. Comparisons with the phylogeographic patterns of other Nearctic freshwater fishes suggest that the salinity tolerance and thermal sensitivityof lake cisco may have been determinant for its extensive postglacial dispersal. The presence or co-occurrence of sympatric or allopatric eco/morphotypes were not found to be necessarily associated with the presence of both haplotype groups.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 20:01:57