A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
CONTEMPORARY ISOLATION-BY-DISTANCE, BUT NOT ISOLATION-BY-TIME, AMONG DEMES OF EUROPEAN GRAYLING (THYMALLUS THYMALLUS, LINNAEUS) WITH RECENT COMMON ANCESTORS
Tekijät: Barson NJ, Haugen TO, Vollestad LA, Primmer CR
Kustantaja: WILEY-BLACKWELL PUBLISHING, INC
Julkaisuvuosi: 2009
Lehti:: Evolution
Tietokannassa oleva lehden nimi: EVOLUTION
Lehden akronyymi: EVOLUTION
Vuosikerta: 63
Numero: 2
Aloitussivu: 549
Lopetussivu: 556
Sivujen määrä: 8
ISSN: 0014-3820
DOI: https://doi.org/10.1111/j.1558-5646.2008.00554.x
Tiivistelmä
The development of isolation by distance (IBD) and isolation by time (IBT) was contrasted among demes of European grayling (Thymallus thymallus) that have diverged within the last 25 generations following colonization of a lake (Lesjaskogsvatnet). We find low but significant levels of genetic differentiation among spawning tributaries and a pattern of IBD among them. We do not, however, find evidence for IBT despite an up to four-week difference in spawning date between "warm/early" and "cold/late" spawning demes and differences in the incubation temperatures experienced by offspring. It appears that IBD has developed more rapidly than IBT in this system and that adaptive divergence has been initiated in the absence of IBT. Although analysis of selected loci could reveal reduced recombination in parts of the genome associated with temporal divergence, our analysis of neutral genetic data suggests that IBD is a more important isolating mechanism in the early stages of adaptive divergence in European grayling.
The development of isolation by distance (IBD) and isolation by time (IBT) was contrasted among demes of European grayling (Thymallus thymallus) that have diverged within the last 25 generations following colonization of a lake (Lesjaskogsvatnet). We find low but significant levels of genetic differentiation among spawning tributaries and a pattern of IBD among them. We do not, however, find evidence for IBT despite an up to four-week difference in spawning date between "warm/early" and "cold/late" spawning demes and differences in the incubation temperatures experienced by offspring. It appears that IBD has developed more rapidly than IBT in this system and that adaptive divergence has been initiated in the absence of IBT. Although analysis of selected loci could reveal reduced recombination in parts of the genome associated with temporal divergence, our analysis of neutral genetic data suggests that IBD is a more important isolating mechanism in the early stages of adaptive divergence in European grayling.
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