Using neutral cline decay to estimate contemporary dispersal: a generic tool and its application to a major crop pathogen.

Abstract:

: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 σ, the standard deviation of parent-offspring dispersal distances, is 1.2 km/generation(1/2) . 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.

journal_name

Ecol Lett

journal_title

Ecology letters

authors

Rieux A,Lenormand T,Carlier J,de Lapeyre de Bellaire L,Ravigné V

doi

10.1111/ele.12090

subject

Has Abstract

pub_date

2013-06-01 00:00:00

pages

721-30

issue

6

eissn

1461-023X

issn

1461-0248

journal_volume

16

pub_type

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