10.5061/DRYAD.758D0
Bermond, Gérald
Institut Sophia Agrobiotech
Cavigliasso, Fanny
Institut Sophia Agrobiotech
Mallez, Sophie
Institut Sophia Agrobiotech
Spencer, Joseph
University of Illinois System
Guillemaud, Thomas
Institut Sophia Agrobiotech
Data from: No clear effect of admixture between two European invading
outbreaks of Diabrotica virgifera virgifera in natura
Dryad
dataset
2015
sample locations
phenotypic data
microsattelite data
2015-07-10T00:00:00Z
2015-07-10T00:00:00Z
en
https://doi.org/10.1371/journal.pone.0106139
191557 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
In this study, we challenged the hypothesis that admixture may have had a
positive impact in the context of the European invasion of the western
corn rootworm (WCR), Diabrotica virgifera virgifera, LeConte. This beetle
was introduced in Europe from the USA several times since the 1980’s. The
multiple introductions of this major pest of cultivated corn led to the
formation of two major outbreaks in North Western (NW) Italy and in
Central and South Eastern (CSE) Europe that eventually merged into a
secondary contact zone where insects from both outbreaks interbreed. We
collected about 600 insects from this contact zone and genotyped them
using 13 microsatellite markers. Three types of information were obtained
from the collected individuals: (i) their survival under starvation; (ii)
their admixed status, determined through a Bayesian method of genetic
clustering and (iii) their mating probability, studied via the detection,
isolation and genotyping of sperm in female spermathecae. Twenty six % and
12% of the individuals were assigned to the NW Italy or the CSE Europe
parental types, respectively, and 23% and 39% to the F1 and backcross
hybrid types, respectively. Globally, our results do not reveal any
significant impact of the admixed status on the mating probability and on
the choice of mating partners. However the admixed status had a sex- and
sampling site-dependent effect on survival in adults under starvation. In
addition sex had an effect on survival, with mortality hazard about 3
times larger in males than in females. The consequences of these findings
for the evolution of the admixture zone of northern Italy are discussed.
Genotypes_DryadPhenotypic_data_Dryad