Mycorrhiza

, Volume 15, Issue 2, pp 137–142

Population genetic structure of an ectomycorrhizal fungus Amanita manginiana in a subtropical forest over two years

Authors

  • Yu Liang
    • Laboratory of Quantitative Vegetation Ecology, Institute of BotanyChinese Academy of Sciences
  • Liang-dong Guo
    • Systematic Mycology and Lichenology Laboratory, Institute of MicrobiologyChinese Academy of Sciences
    • Laboratory of Quantitative Vegetation Ecology, Institute of BotanyChinese Academy of Sciences
Original Paper

DOI: 10.1007/s00572-004-0311-8

Cite this article as:
Liang, Y., Guo, L. & Ma, K. Mycorrhiza (2005) 15: 137. doi:10.1007/s00572-004-0311-8

Abstract

The population genetic structure of the late-stage fungus Amanita manginiana in a natural forest in Dujiangyan, southwest China was examined over two years using inter-simple sequence repeat (ISSR) markers. Seven ISSR primers were used and 170 bands were obtained in this population: 134/160 and 135/153 bands were polymorphic for sporocarps of 2001 and 2002, respectively. Each sporocarp represented a single genet in 2001 and 2002, and no identical genets were found between the two years. The results of genetic similarity comparison, using unweighted pair group method with arithmetic means, and analysis of molecular variance, indicated that although genetic variances were mainly within individuals of the same year the genetic variance between years was statistically significant (P<0.001). Relationships between genetic similarity and spatial distance of pairwise sporocarps were also found to be different in the two years. The differences in genetic structure and genetic similarity between individuals of the two years implied that the sporocarps were not likely to be derived from continuous generations, i.e., the sporocarps collected in 2002 were not developed from sexual spores dispersed by sporocarps of 2001. We suggest that the life-cycle traits of ectomycorrhizal (ECM) fungi should be considered in genetic studies on ECM fungal populations.

Keywords

Amanita manginianaInter-simple sequence repeatGenetic structureLife-cycle traits

Copyright information

© Springer-Verlag 2004