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No evidence of population structure across three isolated subpopulations of Russula brevipes in an oak/pine woodland
Author(s) -
Bergemann Sarah E.,
Douhan Greg W.,
Garbelotto Matteo,
Miller Steven L.
Publication year - 2006
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2006.01654.x
Subject(s) - basidiocarp , biology , population , temperate rainforest , woodland , ecology , genetic structure , botany , genetic diversity , ecosystem , demography , taxonomy (biology) , sociology
Summary• Russula brevipes is common ectomycorrhizal (EM) fungus that is associated with several hosts across temperate forest ecosystems. A previous study has demonstrated that substructuring across large geographic distances (1500 km) occurs in the western USA. • To examine genetic structure over a more localized scale, basidiocarps of Russula brevipes from three subpopulations, separated by distances of 230–1090 m, were collected over two consecutive years in an oak/pine woodland. Microsatellite loci were used to test for population differentiation both among subpopulations and by year. • No significant population differentiation was detected between subpopulations (θ ST = 0.01) or between years (θ ST = 0.01). Most loci were consistent with a Hardy–Weinburg equilibrium and 82% of the genets between seasons from similar sampling localities constituted new genotypes. • These results indicate that R. brevipes constitutes a randomly mating population with no genetic differentiation between locations or across successive fruiting seasons.