Comparative genetics of invasive populations of walnut aphid, Chromaphis juglandicola, and its introduced parasitoid, Trioxys pallidus, in California.

ABSTRACT: Coevolution may be an important component of the sustainability of importation biological control, but how frequently introduced natural enemies coevolve with their target pests is unclear. Here we explore whether comparative population genetics of the invasive walnut aphid, Chromaphis juglandicola, and its introduced parasitoid, Trioxys pallidus, provide insights into the localized breakdown of biological control services in walnut orchards in California. We found that sampled populations of C. juglandicola exhibited higher estimates of genetic differentiation (F_ST) than co-occurring populations of T. pallidus. In contrast, estimates of both the inbreeding coefficient (G_IS) and contemporary gene flow were higher for T. pal

SUBMITTER: Andersen JC 

PROVIDER: S-EPMC5756880 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature