title: Genetic structure of a population of the ectomycorrhizal fungus Russula vinosa in subtropical woodlands in southwest China.
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 (Sm) 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.
authors.affiliation: Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Chinese Academy of Sciences, 100093, Beijing.
authors.forename: Yu
authors.initials: Y
authors.lastname: Liang
authors.forename: Liang-dong
authors.initials: LD
authors.lastname: Guo
authors.forename: Ke-ping
authors.initials: KP
authors.lastname: Ma
mesh_terms: D000363:Agaricales / Q000235:genetics*; D002681:China; D014644:Genetic Variation / Q000235:genetics; D038821:Mycorrhizae / Q000235:genetics*; D019105:Random Amplified Polymorphic DNA Technique; D014197:Trees / Q000382:microbiology; D014329:Tropical Climate