Journal Article

Fine-scale genetic structure of natural Tuber aestivum sites in southern Germany

Deutsch Truffelbaume, Global Change Research Centre (CzechGlobe), Sproll, Ludger, ANR-11-LABX-0002,ARBRE,Recherches Avancées sur l'Arbre et les Ecosytèmes Forestiers, University of Freiburg, COST action Project FP1203 ; Swiss State Secretariat for Education Research and Innovation (SERI) ; WSL-internal "DITREC" project ; Ernst Gohner Stiftung 2012-1961/3 ; SERI ; French National Research Agency (ANR) as part of the "Investissements d'Avenir" program (Lab of Excellence ARBRE) ANR-11-LABX-0002-01 ; TUBEREVOL project, Molinier, Virginie, Oeschger Centre for Climate Change Research (OCCR) ; Universität Bern = University of Bern = Université de Berne (UNIBE), Tegel, Willy, Martin, Francis, Moser, Barbara, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Murat-Furminieux, Claude, Büntgen, Ulf, Interactions Arbres-Microorganismes (IAM) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Egli, Simon, Baltensweiler, Andri, Stobbe, Ulrich, Meier, Barbara, Peter, Martina

2016

Overview

Although the Burgundy truffle (Tuber aestivum) is an ectomycorrhizal fungus of important economic value, its subterranean life cycle and population biology are still poorly understood.Here, we determine mating type and simple sequence repeat (SSR) maternal genotypes of mapped fruiting bodies to assess their genetic structure within two naturally colonized forest sites in southern Germany. Forty-one genotypes were identified from 112 fruiting bodies. According to their mating types, the maternal genotypes were aggregated only in one population. Genotypic diversity of individuals that mostly were small and occurred in 1 out of 2 years of sampling was high. Although these results suggested a ruderal colonization strategy, some genets spread several hundred meters.This result indicates that, besides sexual spore dispersal, vegetative growth or spreading by mycelial propagules contributes to dissemination. In one site, fewer individuals with a tendency to expand genets belonging to only one genetic group were observed. In the second site, numerous small individuals were found and were grouped into two clearly differentiated genetic groups that were spatially intermingled. Forest characteristics and disturbances are possible reasons for the observed genetic patterns.Our findings contribute to a better understanding of the biology of one of the most widespread and commercially important truffle species. This knowledge is critical for establishing and maintaining sustainable long-term truffle cultivations.

• Publisher: Springer Verlag,CCSD,Springer Berlin Heidelberg,Springer Nature B.V
• Subject: Agriculture / Ascomycota - genetics / Biomedical and Life Sciences / DNA, Fungal - genetics / Ecology / economic valuation / Forestry / forests / fruiting bodies / Fruiting Bodies, Fungal / Genes, Mating Type, Fungal - genetics / Genetic Markers / Genetic structure / Genetic Variation / Genotype / Genotypes / Germany / Life Sciences / mating types / Microbiology / microsatellite repeats / mycelium / mycorrhizae / Mycorrhizae - genetics / mycorrhizal fungi / Original Article / Plant Sciences / Population biology / spore dispersal / truffles / Tuber aestivum / vegetative growth
• ISBN: 9780003860702, 0003860701