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Large-scale genetic admixture suggests high dispersal in an insect pest, the apple fruit moth

Elameen, Abdelhameed and Klutsch, Cornelya F. C. and Floystad, Ida and Knudsen, Geir K. and Tasin, Marco and Hagen, Snorre B. and Eiken, Hans Geir (2020). Large-scale genetic admixture suggests high dispersal in an insect pest, the apple fruit moth. PLoS ONE. 15 , e0236509 , 1-24
[Journal article]

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Abstract

Knowledge about population genetic structure and dispersal capabilities is important for the development of targeted management strategies for agricultural pest species. The apple fruit moth,Argyresthia conjugella(Lepidoptera, Yponomeutidae), is a pre-dispersal seed predator. Larvae feed on rowanberries (Sorbus aucuparia), and when rowanberry seed production is low (i.e., inter-masting), the moth switches from laying eggs in rowanberries to apples (Malus domestica), resulting in devastating losses in apple crops. Using genetic methods, we investigated if this small moth expresses any local genetic structure, or alternatively if gene flow may be high within the Scandinavian Peninsula (similar to 850.000 km(2), 55(o)- 69(o)N). Genetic diversity was found to be high (n = 669, mean He = 0.71). For three out of ten tetranucleotide STRs, we detected heterozygote deficiency caused by null alleles, but tests showed little impact on the overall results. Genetic differentiation between the 28 sampling locations was very low (average FST = 0.016, P < 0.000). Surprisingly, we found that all individuals could be assigned to one of two non-geographic genetic clusters, and that a third, geographic cluster was found to be associated with 30% of the sampling locations, with weak but significant signals of isolation-by-distance. Conclusively, our findings suggest wind-aided dispersal and spatial synchrony of both sexes of the apple fruit moth over large areas and across very different climatic zones. We speculate that the species may recently have had two separate genetic origins caused by a genetic bottleneck after inter-masting, followed by rapid dispersal and homogenization of the gene pool across the landscape. We suggest further investigations of spatial genetic similarities and differences of the apple fruit moth at larger geographical scales, through life-stages, across inter-masting, and during attacks by the parasitoid wasp (Microgaster politus).

Authors/Creators:Elameen, Abdelhameed and Klutsch, Cornelya F. C. and Floystad, Ida and Knudsen, Geir K. and Tasin, Marco and Hagen, Snorre B. and Eiken, Hans Geir
Title:Large-scale genetic admixture suggests high dispersal in an insect pest, the apple fruit moth
Year of publishing :2020
Volume:15
Article number:e0236509
Number of Pages:24
Publisher:PLoS
ISSN:1932-6203
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
URN:NBN:urn:nbn:se:slu:epsilon-p-107713
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107713
Additional ID:
Type of IDID
DOI10.1371/journal.pone.0236509
Web of Science (WoS)000561793900035
ID Code:17538
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Protection Biology
Deposited By: SLUpub Connector
Deposited On:05 Oct 2020 06:22
Metadata Last Modified:05 Oct 2020 06:22

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