期刊
ECOLOGY LETTERS
卷 16, 期 6, 页码 721-730出版社
WILEY
DOI: 10.1111/ele.12090
关键词
Dispersal ecology; emergent disease; gene flow estimation; genetic clines; landscape genetics; Mycosphaerella fijiensis; neutral markers; non-equilibrium populations; secondary contact
类别
Dispersal is a key parameter of adaptation, invasion and persistence. Yet standard population genetics inference methods hardly distinguish it from drift and many species cannot be studied by direct mark-recapture methods. Here, we introduce a method using rates of change in cline shapes for neutral markers to estimate contemporary dispersal. We apply it to the devastating banana pest Mycosphaerella fijiensis, a wind-dispersed fungus for which a secondary contact zone had previously been detected using landscape genetics tools. By tracking the spatio-temporal frequency change of 15 microsatellite markers, we find that sigma, the standard deviation of parentoffspring dispersal distances, is 1.2km/generation1/2. The analysis is further shown robust to a large range of dispersal kernels. We conclude that combining landscape genetics approaches to detect breaks in allelic frequencies with analyses of changes in neutral genetic clines offers a powerful way to obtain ecologically relevant estimates of dispersal in many species.
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