Show simple item record

dc.contributor.authorAngelella, Gina Marie
dc.contributor.authorMichel, Andy P.
dc.contributor.authorKaplan, Ian
dc.date.accessioned2019-03-20T18:29:11Z
dc.date.available2019-03-20T18:29:11Z
dc.date.issued2018
dc.identifier.urihttp://hdl.handle.net/10919/88507
dc.description.abstractSmall, mobile insects are notoriously challenging to track across landscapes and manage in agricultural fields. However, genetic differentiation among insect populations and host plants acquired through host‐associated differentiation could be exploited to infer movement within crop systems and damage potential. Although many insects exhibit host‐associated differentiation, management strategies for insect vectors of plant pathogens assume a homogenous population. Nevertheless, phenotypic changes derived from host‐associated differentiation could manifest in altered behavior or physiology affecting the likelihood of vector–pathogen–plant interactions, or the subsequent efficiency of pathogen transmission. We used SNPs to assess genotypic structure and host‐associated differentiation in the cowpea aphid, Aphis craccivora Koch (Hemiptera: Aphididae). To do so, we sampled A. craccivora across the Midwestern United States. from two host plants, alfalfa (Medicago sativa) and black locust (Robinia pseudoacacia)—putative source populations for winged migrants. Simultaneously, we sampled winged A. craccivora landing in pumpkin fields where they transmit viruses. Structure analyses supported host‐associated differentiation by identifying two major genotypic groups: an alfalfa group containing a single multilocus genotype and a locust group containing all others. Winged locust‐group aphids landed at a much greater magnitude within focal fields during year 2 than year 1, while those in the alfalfa group remained fairly consistent. Spatial autocorrelation analyses indicated locust‐group aphid movement was characterized by small‐scale dispersal during year 2, likely originating from populations within 10 km. We also detected strong temporal differences in colonization from the two host plants. Early in the summer, most winged aphids (79.4%) derived from the locust group, whereas late in the summer more (58.3%) were from the alfalfa group. Because early crop growth stages are more susceptible to damage from aphid‐vectored viruses, these data implicate locust as the more important source and illustrate how host‐associated differentiation can be used to track dispersal and inform management of heterogeneous pest populations.en_US
dc.description.sponsorshipUSDA NIFA AFRI Predoctoral Fellowship Program, Grant/Award Number: 11588839en_US
dc.description.sponsorshipUSDA North Central Region IPM Grants Program, Grant/Award Number: 11-34103- 30723en_US
dc.description.sponsorshipVirginia Techen_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.publisherWileyen_US
dc.rightsAttribution 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/us/*
dc.titleUsing host‐associated differentiation to track source population and dispersal distance among insect vectors of plant pathogensen_US
dc.typeArticle - Refereeden_US
dc.title.serialEvolutionary Applicationsen_US
dc.identifier.doihttps://doi.org/10.1111/eva.12733
dc.type.dcmitypeTexten_US


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record

Attribution 3.0 United States
License: Attribution 3.0 United States