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Fine-scale genetic structure of natural Tuber aestivum sites in southern Germany
V. Molinier, C. Murat, A. Baltensweiler, U. Büntgen, F. Martin, B. Meier, B. Moser, L. Sproll, U. Stobbe, W. Tegel, S. Egli, M. Peter,
Language English Country Germany
Document type Journal Article
NLK
ProQuest Central
from 2003-01-01 to 1 year ago
Medline Complete (EBSCOhost)
from 2011-01-01 to 1 year ago
Health & Medicine (ProQuest)
from 2003-01-01 to 1 year ago
- MeSH
- Ascomycota genetics MeSH
- DNA, Fungal genetics MeSH
- Genes, Mating Type, Fungal genetics MeSH
- Genetic Variation MeSH
- Genetic Markers MeSH
- Genotype MeSH
- Mycorrhizae genetics MeSH
- Fruiting Bodies, Fungal MeSH
- Publication type
- Journal Article MeSH
- Geographicals
- Germany MeSH
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.
Deutsche Trüffelbäume Radolfzell Germany
Institute of Forest Sciences IWW Freiburg University Freiburg Germany
Swiss Federal Institute for Forest Snow and Landscape Research Birmensdorf 8903 Switzerland
References provided by Crossref.org
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- $a 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.
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