Wissenschaftliche Publikationen der HSWT

Moises Exposito-Alonso, Claude Becker, Verena J. Schuenemann, Ella Reiter, Claudia Setzer, Radka Slovak, Benjamin Brachi, Jörg Hagmann, Prof. Dr. Dominik Grimm, Jiahui Chen, Wolfgang Busch, Joy Bergelson, Rob W. Ness, Detlef Weigel

Berechtigungen: Open Access
Berechtigungen: Peer Reviewed

By following the evolution of populations that are initially genetically homogeneous, much can be learned about core biological principles. For example, it allows for detailed studies of the rate of emergence of de novo mutations and their change in frequency due to drift and selection. Unfortunately, in multicellular organisms with generation times of months or years, it is difficult to set up and carry out such experiments over many generations. An alternative is provided by “natural evolution experiments” that started from colonizations or invasions of new habitats by selfing lineages. With limited or missing gene flow from other lineages, new mutations and their effects can be easily detected. North America has been colonized in historic times by the plant Arabidopsis thaliana, and although multiple intercrossing lineages are found today, many of the individuals belong to a single lineage, HPG1. To determine in this lineage the rate of substitutions—the subset of mutations that survived natural selection and drift–, we have sequenced genomes from plants collected between 1863 and 2006. We identified 73 modern and 27 herbarium specimens that belonged to HPG1. Using the estimated substitution rate, we infer that the last common HPG1 ancestor lived in the early 17th century, when it was most likely introduced by chance from Europe. Mutations in coding regions are depleted in frequency compared to those in other portions of the genome, consistent with purifying selection. Nevertheless, a handful of mutations is found at high frequency in present-day populations. We link these to detectable phenotypic variance in traits of known ecological importance, life history and growth, which could reflect their adaptive value. Our work showcases how, by applying genomics methods to a combination of modern and historic samples from colonizing lineages, we can directly study new mutations and their potential evolutionary relevance.

Veröffentlichungen der HSWT

Food value chain linkages and household food security in Tanzania (2018) Food Security 10 , S. 827-839. DOI: 10.1007/s12571-018-0792-5

Naturnahe Moorrand-Fichtenwälder im Bayerischen Wald (2018) AFSV-Schriftenreihe "Waldökologie, Landschaftsforschung und Naturschutz" (17), S. 69-80.

Vegetation-based detection of thick forest floors and their decline in the Calcareous Alps (2018) Vortrag auf dem 7th workshop ("Vegetation Databases and Detection of Environmental Change") of the German working group on vegetation databases in Jena, März 2018 .

High resilience of plant species composition to coppice restoration – a chronosequence from the oak woodland of Gerolfing (Bavaria) (2018) Tuexenia 38 , S. 61-78. DOI: 10.14471/2017.38.001

Neuartiges Material für Wuchshüllen (2018) AFZ-Der Wald 73 (5), S. 45-49.

What are the organismic elements of vegetation science? (2018) Applied Vegetation Science 21 (2), S. 341-344. DOI: 10.1111/avsc.12371

Lastmanagement auf Verteilnetzebene: Wann lassen sich erneuerbare Energien wirtschaftlich integrieren? Ein Stromgestehungskostenmodell (2018) 15. Symposium Energieinnovation – Technische Universität Graz, Österreich, 14. – 16. Februar 2018 .

The rate and potential relevance of new mutations in a colonizing plant lineage (2018) PLoS Genetics 14 (2). DOI: 10.1371/journal.pgen.1007155

Betreuung der Publikationsseiten

Gerhard Radlmayr

Semiha Savas

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