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The population of the hypogeous fungus Tuber aestivum syn. T. uncinatum on the island of Gotland

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Abstract

The aim of our study was to examine the genetic variation within Tuber aestivum on the Baltic island of Gotland, Sweden. Variation in such a limited geographical area should help illuminate the dispersal abilities of T. aestivum. Knowledge of the genetic variation in this northern outpost could also be useful in the selection of inoculum for the establishment of truffle orchards. Genetic structure and homogeneity of the population were studied using principal component and parsimony analyses of randomly amplified polymorphic DNA data. Our inventories showed that T. aestivum is abundantly distributed in suitable habitats on Gotland. The genetic variation observed suggests sexual reproduction and slow dispersal on the island. It is possible that the present population was established from one introduction, which may be due to ability to survive in this habitat rather than to rare colonising events. The T. aestivum population on Gotland may be an ecotype adapted to the climate and soil conditions on the island.

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Acknowledgements

We would like to extend our gratitude to Elsa Bohus-Jensen, Gérard Chevalier, Michel Jalade, Pierre and Marcelle Poinsot, Olle Persson and landowners on Gotland for essential help with the truffle inventories. We thank Francis Martin for sharing his RAPD knowledge and primers, Inez Tommerup for kindly commenting on our manuscript and Dominique Delage, head of the truffle museum “L’écomusée de la truffe”, Sorges, France, for making the truffle blind test. We also wish to thank Bertil Widbom at Gotland University College for valuable support. This study was financed by the Municipality of Gotland, the Gotland County Administration, the European Agriculture Guidance and Guarantee Fund under the Objective 5b Gotland Programme and the European Regional Development Fund under the Objective 2 Islands Programme, and further supported by the KK Foundation (Kunskaps- och kompetensutvecklingsstiftelsen), Carl the XVI Gustafs 50th Anniversary Fund and Carl Tryggers Foundation.

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Authors and Affiliations

  1. Department of Systematic Botany, Uppsala University, Norbyvägen 18D, 752 36 , Uppsala, Sweden

    Christina Wedén

  2. Gotland University College, 621 67 , Visby, Sweden

    Christina Wedén

  3. Museum of Evolution, Botany Section, Uppsala University, Norbyvägen 16, 752 36 , Uppsala, Sweden

    Eric Danell

  4. Department of Plant and Microbial Biology, College of Natural Resources, 111 Koshland Hall, Berkeley , CA , 94720-3102, USA

    Francisco J. Camacho

  5. Department of Medicinal Chemistry, Division of Pharmacognosy, Uppsala University, Box 574, 751 23 , Uppsala, Sweden

    Anders Backlund

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  1. Christina Wedén
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  2. Eric Danell
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  3. Francisco J. Camacho
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  4. Anders Backlund
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Correspondence to Christina Wedén.

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Wedén, C., Danell, E., Camacho, F.J. et al. The population of the hypogeous fungus Tuber aestivum syn. T. uncinatum on the island of Gotland. Mycorrhiza 14, 19–23 (2004). https://doi.org/10.1007/s00572-003-0271-4

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  • DOI: https://doi.org/10.1007/s00572-003-0271-4

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