Does sex‐biased dispersal account for the lack of geographic and host‐associated differentiation in introduced populations of an aphid parasitoid?

Ecology and Evolution

Francisca Zepeda-Paulo²  Blas Lavandero²  Frédérique Mahéo¹  Emilie Dion¹  Yannick Outreman¹  Jean-Christophe Simon¹ 

[1] INRA, Institut de Génétique, Environnement et Protection des Plantes (UMR IGEPP), Domaine de La Motte, Le Rheu Cedex, France;Laboratorio de Interacciones Insecto-Planta, Instituto de Ciencias Biológicas, Universidad de Talca, Talca, Chile

关键词: Aphid parasitoids;    Aphidius ervi;    genetic differentiation;    sex‐biased dispersal;    host fidelity;    microsatellite loci;    sibship inference;   

DOI  :  10.1002/ece3.1504

来源: Wiley

【 摘 要 】

Abstract

Host recognition and use in female parasitoids strongly relies on host fidelity, a plastic behavior which can significantly restrict the host preferences of parasitoids, thus reducing the gene flow between parasitoid populations attacking different insect hosts. However, the effect of migrant males on the genetic differentiation of populations has been frequently ignored in parasitoids, despite its known impact on gene flow between populations. Hence, we studied the extent of gene flow mediated by female and male parasitoids by assessing sibship relationships among parasitoids within and between populations, and its impact on geographic and host-associated differentiation in the aphid parasitoid Aphidius ervi. We report evidences of a high gene flow among parasitoid populations on different aphid hosts and geographic locations. The high gene flow among parasitoid populations was found to be largely male mediated, suggested by significant differences in the distribution of full-sib and paternal half-sib dyads of parasitoid populations.

【 授权许可】

CC BY   
© 2015 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.

Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.