期刊
MYCORRHIZA
卷 14, 期 4, 页码 235-240出版社
SPRINGER
DOI: 10.1007/s00572-003-0260-7
关键词
genet; genetic similarity; RADP; second-order analysis; spatial pattern
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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