9 Works

Data from: Environmental versus anthropogenic effects on population adaptive divergence in the freshwater snail Lymnaea stagnalis

Anthony Bouétard, Jessica Côte, Anne-Laure Besnard, Marc Collinet & Marie-Agnès Coutellec
Repeated pesticide contaminations of lentic freshwater systems located within agricultural landscapes may affect population evolution in non-target organisms, especially in species with a fully aquatic life cycle and low dispersal ability. The issue of evolutionary impact of pollutants is therefore conceptually important for ecotoxicologists. The impact of historical exposure to pesticides on genetic divergence was investigated in the freshwater gastropod Lymnaea stagnalis, using a set of 14 populations from contrasted environments in terms of pesticide...

Data from: Exploring the causes of small effective population sizes in cyst nematodes using artificial Globodera pallida populations

Josselin Montarry, Sylvie Bardou-Valette, Romain Mabon, Pierre-Loup Jan, Sylvain Fournet, Eric Grenier & Eric J. Petit
The effective size of a population is the size of an ideal population which would undergo genetic drift at the same rate as the real population. The balance between selection and genetic drift depends on the effective population size (Ne), rather than the real numbers of individuals in the population (N). The objectives of the present study were to estimate Ne in the potato cyst nematode Globodera pallida and to explore the causes of a...

Data from: A cost-and-time effective procedure to develop SNP markers for multiple species: a support for community genetics

Chrystelle Delord, Gilles Lassalle, Adrien Oger, Dominique Barloy, Marie-Agnes Coutellec, Adline Delcamp, Guillaume Evanno, Clemence Genthon, Erwan Guichoux, Pierre-Yves Le Bail, Patricia Le Quilliec, Guillaume Longin, Olivier Lorvelec, Marie Massot, Elodie Reveillac, Raphaelle Rinaldo, Jean-Marc Roussel, Regis Vigouroux, Sophie Launey & Eric J. Petit
1.Multi‐species population genetics is an emerging field that provides insight relevant to conservation biology and community ecology. However, to date, this approach is limited to species with available genetic resources. The use of thousands of single nucleotide polymorphism (SNP) markers developed from recent genotyping‐by‐sequencing (GBS) technologies is a roadmap for the study of non‐model species, but remains cost prohibitive when several, distantly related species are involved. 2.We aimed to overcome this issue by using a...

Data from: Environmental DNA surveillance for invertebrate species: advantages and technical limitations to detect invasive crayfish Procambarus clarkii in freshwater ponds

Anne Tréguier, Jean-Marc Paillisson, Tony Dejean, Alice Valentini, Martin A. Schlaepfer & Jean-Marc Roussel
1. The introduction of non-native species is a major threat to biodiversity. While eradication programs of well-established invaders are costly and hazardous for non-target species, the early detection of a non-native species at low density is critical for preventing biological invasions in recipient ecosystems. Recent studies reveal that environmental DNA (eDNA) is a powerful tool for detecting target species in aquatic ecosystems, but these studies focus mostly on fish and amphibians. 2. We examine the...

Data from: Melanin-based coloration of sneaker male Atlantic salmon is linked to viability and emergence timing of their offspring

Lucas Marie-Orleach, Jean-Marc Roussel, Jérôme Bugeon, Julien Tremblay, Dominique Ombredane & Guillaume Evanno
The ‘good genes’ hypothesis of sexual selection predicts that male ornaments are favoured by female mate choice because male ornament reveals genetic quality. In species with different male reproductive tactics, variation in genetic quality among ‘sneaking’ males has rarely been investigated, as usually ‘sneakers’ are thought not to be chosen by females. Here we focused on the alternative reproductive tactic in Atlantic salmon (Salmo salar Linnaeus, 1758) to test whether the skin colour of sneakers...

Data from: Temporal sampling helps unravel the genetic structure of naturally occurring populations of a phytoparasitic nematode. 2. Separating the relative effects of gene flow and genetic drift

Cécile Gracianne, Pierre-Loup Jan, Sylvain Fournet, Eric Olivier, Jean-François Arnaud, Catherine Porte, Sylvie Bardou-Valette, Marie-Christine Denis, Eric Petit & Eric J. Petit
Studying wild pathogen populations in natural ecosystems offers the opportunity to better understand the evolutionary dynamics of biotic diseases in crops and to enhance pest control strategies. We used simulations and genetic markers to investigate the spatial and temporal population genetic structure of wild populations of the beet cyst nematode Heterodera schachtii on a wild host plant species, the sea beet (Beta vulgaris spp. maritima), the wild ancestor of cultivated beets. Our analysis of the...

Data from: Temporal sampling helps unravel the genetic structure of naturally occurring populations of a phytoparasitic nematode. 1. Insights from the estimation of effective population sizes

Pierre-Loup Jan, Cécile Gracianne, Sylvain Fournet, Eric Olivier, Jean-Francois Arnaud, Catherine Porte, Sylvie Bardou-Valette, Marie-Christine Denis & Eric J. Petit
The sustainability of modern agriculture relies on strategies that can control the ability of pathogens to overcome chemicals or genetic resistances through natural selection. This evolutionary potential, which depends partly on effective population size (Ne), is greatly influenced by human activities. In this context, wild pathogen populations can provide valuable information for assessing the long-term risk associated with crop pests. In this study, we estimated the effective population size of the beet cyst nematode, Heterodera...

Data from: Heterozygote deficits in cyst plant parasitic nematodes: possible causes and consequences

Josselin Montarry, Pierre-Loup Jan, Cécile Gracianne, Andrew D. J. Overall, Sylvie Bardou-Valette, Eric Olivier, Sylvain Fournet, Eric Grenier & Eric J. Petit
Deviations of genotypic frequencies from Hardy–Weinberg equilibrium (HWE) expectations could reveal important aspects of the biology of populations. Deviations from HWE due to heterozygote deficits have been recorded for three plant-parasitic nematode species. However, it has never been determined whether the observed deficits were due (i) to the presence of null alleles, (ii) to a high level of consanguinity and/or (iii) to a Wahlund effect. The aim of the present work was, while taking into...

Data from: Functional connectivity in replicated urban landscapes in the land snail (Cornu aspersum)

Manon Balbi, Aude Ernoult, Pedro Poli, Luc Madec, Annie Guiller, Marie-Claire Martin, Jean Nabucet, Véronique Petit Beaujouan & Eric J. Petit
Urban areas are highly fragmented and thereby exert strong constraints on individual dispersal. Despite this, some species manage to persist in urban areas, such as the garden snail, Cornu aspersum, which is common in cityscapes despite its low mobility. Using landscape genetic approaches, we combined study area replication and multi-scale analysis to determine how landscape composition, configuration, and connectivity influence snail dispersal across urban areas. At the overall landscape scale, areas with a high percentage...

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