2 Works

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...

Registration Year

  • 2015

Resource Types

  • Dataset


  • Institute for Genetics, Environment and Plant Protection
  • Ecology and Ecosystem Health
  • University of Brighton