ORCID Profile
0000-0001-9497-1446
Current Organisation
CNRS
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Publisher: Wiley
Date: 03-02-2021
Abstract: We present DILS, a deployable statistical analysis platform for conducting demographic inferences with linked selection from population genomic data using an Approximate Bayesian Computation framework. DILS takes as input single‐population or two‐population data sets (multilocus fasta sequences) and performs three types of analyses in a hierarchical manner, identifying: (a) the best demographic model to study the importance of gene flow and population size change on the genetic patterns of polymorphism and ergence, (b) the best genomic model to determine whether the effective size Ne and migration rate N , m are heterogeneously distributed along the genome (implying linked selection) and (c) loci in genomic regions most associated with barriers to gene flow. Also available via a Web interface, an objective of DILS is to facilitate collaborative research in speciation genomics. Here, we show the performance and limitations of DILS by using simulations and finally apply the method to published data on a ergence continuum composed by 28 pairs of Mytilus mussel populations/species.
Publisher: Springer Science and Business Media LLC
Date: 20-08-2014
DOI: 10.1038/NATURE13685
Abstract: Genetic ersity is the amount of variation observed between DNA sequences from distinct in iduals of a given species. This pivotal concept of population genetics has implications for species health, domestication, management and conservation. Levels of genetic ersity seem to vary greatly in natural populations and species, but the determinants of this variation, and particularly the relative influences of species biology and ecology versus population history, are still largely mysterious. Here we show that the ersity of a species is predictable, and is determined in the first place by its ecological strategy. We investigated the genome-wide ersity of 76 non-model animal species by sequencing the transcriptome of two to ten in iduals in each species. The distribution of genetic ersity between species revealed no detectable influence of geographic range or invasive status but was accurately predicted by key species traits related to parental investment: long-lived or low-fecundity species with brooding ability were genetically less erse than short-lived or highly fecund ones. Our analysis demonstrates the influence of long-term life-history strategies on species response to short-term environmental perturbations, a result with immediate implications for conservation policies.
Publisher: Wiley
Date: 08-07-2022
DOI: 10.1111/DDI.13597
Abstract: The goal of this study was to investigate the invasion history of the weed Sonchus oleraceus in Australia by comparing the population genetic structure of in iduals at different locations in Australia, and in the most likely areas of origin in the native range. S les were collected in Europe and Morocco, North Africa (27 locations), and Australia (17 locations). We performed population genetic analyses using a large dataset comprising 2883 single nucleotide polymorphism markers from 547 plant s les and investigated the invasion history of S. oleraceus with Approximate Bayesian Computation and Random Forest classification algorithms. We compared single and multiple invasion scenarios considering admixture having occurred before and after introduction. Our results revealed high levels of inbreeding within s ling locations in the two ranges. Analyses also showed that S. oleraceus was possibly introduced to Australia at least twice: a first introduction around 1000 years ago before British settlement and a more recent introduction (~65 years ago) from Europe and North Africa. We also found evidence of post‐introduction admixture and a potential reintroduction of S. oleraceus from Australia back to its native range. We conclude that the invasion history of S. oleraceus into Australia is probably historic (i.e. prior to British settlements) and complex showing recent evidence of post‐introduction admixture. The complex invasion history of S. oleraceus in Australia poses challenges for the search of potential biological control agents.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for camille roux.