Genetic structure of a population of the ectomycorrhizal fungus<Emphasis Type="Italic"> Russula vinosa</Emphasis> in subtropical woodlands in southwest China |
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Authors: | Yu?Liang Liang-dong?Guo Email author" target="_blank">Ke-ping?MaEmail author |
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Institution: | (1) Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, 100093 Beijing, China;(2) Systematic Mycology and Lichenology Laboratory, Institute of Microbiology, Chinese Academy of Sciences, 100080 Beijing, China |
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Abstract: | The genetic structure of a population of the ectomycorrhizal fungus Russula vinosa was analyzed using random amplified polymorphic DNA markers. Of 121 bands, 114 (94.2%) were polymorphic and there was a high genetic diversity (H=34.98) in this population. Each sporocarp represented a different genet and the genet size was no larger than 1 m. Pairwise sporocarps closer than 10 m had significantly higher genetic similarity. Second-order analysis indicated clumps with a radius of about 20 m in the whole population as well as in three genetic groups, i.e. simple matching similarity coefficients (S
m
) 0.5–0.6, 0.6–0.7, and 0.7–0.8, respectively. The high-genetic-similarity group tended to have small clumps with high density, whereas the low-genetic-similarity group tended to have large clumps with low density. The spatial pattern analysis showed that the population mainly spread by short-distance spore dispersal rather than vegetative growth of dicaryophytic mycelia or long-distance spore dispersal. |
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Keywords: | Genet Genetic similarity RADP Second-order analysis Spatial pattern |
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