@article{5c98d724304049579e0e8266ac47684a,
title = "Migration without interbreeding: Evolutionary history of a highly selfing Mediterranean grass inferred from whole genomes",
abstract = "Wild plant populations show extensive genetic subdivision and are far from the ideal of panmixia which permeates population genetic theory. Understanding the spatial and temporal scale of population structure is therefore fundamental for empirical population genetics – and of interest in itself, as it yields insights into the history and biology of a species. In this study we extend the genomic resources for the wild Mediterranean grass Brachypodium distachyon to investigate the scale of population structure and its underlying history at whole-genome resolution. A total of 86 accessions were sampled at local and regional scales in Italy and France, which closes a conspicuous gap in the collection for this model organism. The analysis of 196 accessions, spanning the Mediterranean from Spain to Iraq, suggests that the interplay of high selfing and seed dispersal rates has shaped genetic structure in B. distachyon. At the continental scale, the evolution in B. distachyon is characterized by the independent expansion of three lineages during the Upper Pleistocene. Today, these lineages may occur on the same meadow yet do not interbreed. At the regional scale, dispersal and selfing interact and maintain high genotypic diversity, thus challenging the textbook notion that selfing in finite populations implies reduced diversity. Our study extends the population genomic resources for B. distachyon and suggests that an important use of this wild plant model is to investigate how selfing and dispersal, two processes typically studied separately, interact in colonizing plant species.",
keywords = "ORIGINAL ARTICLE, ORIGINAL ARTICLES, flowering time, heterozygosity, population structure, seed dispersal, selfing, Genetic Variation, Genetics, Population, Genome, Plant, Brachypodium/genetics, Microsatellite Repeats",
author = "Christoph Stritt and Gimmi, {Elena L.} and Michele Wyler and Bakali, {Abdelmonaim H.} and Aleksandra Skalska and Robert Hasterok and Mur, {Luis A.J.} and Nicola Pecchioni and Roulin, {Anne C.}",
note = "Funding Information: The authors are especially thankful to the Swiss National Science Foundation and the University of Zurich's Research Priority Program (URPP) Evolution in Action for funding this project. AS, LAJM and RH acknowledge the funding from the National Science Centre Poland (grant no. 2015/18/M/NZ2/00394). The authors would like to thank the Genetic Diversity Center at ETH Zurich for providing access on their High Performance Computing resources as well as Christian Beisel at BSSE-Basel, Gerhard Herren and Helen Zbinden for their support in the laboratory. The authors also would like to thank Marco Maccaferri, Saverio Sciandrello and Pietro Minissale for their help in sampling in Italy, Jean-Paul Peltier for establishing connection between Switzerland and Morocco, Christian Parisod for his comments on an early draft of the manuscript and the three anonymous reviewers for contributing greatly to improving the manuscript. Funding Information: The authors are especially thankful to the Swiss National Science Foundation and the University of Zurich's Research Priority Program (URPP) for funding this project. AS, LAJM and RH acknowledge the funding from the National Science Centre Poland (grant no. 2015/18/M/NZ2/00394). The authors would like to thank the Genetic Diversity Center at ETH Zurich for providing access on their High Performance Computing resources as well as Christian Beisel at BSSE‐Basel, Gerhard Herren and Helen Zbinden for their support in the laboratory. The authors also would like to thank Marco Maccaferri, Saverio Sciandrello and Pietro Minissale for their help in sampling in Italy, Jean‐Paul Peltier for establishing connection between Switzerland and Morocco, Christian Parisod for his comments on an early draft of the manuscript and the three anonymous reviewers for contributing greatly to improving the manuscript. Evolution in Action Publisher Copyright: {\textcopyright} 2021 The Authors. Molecular Ecology published by John Wiley & Sons Ltd.",
year = "2021",
month = dec,
day = "27",
doi = "10.1111/mec.16207",
language = "English",
volume = "31",
pages = "70--85",
journal = "Molecular Ecology",
issn = "0962-1083",
publisher = "Wiley",
number = "1",
}