ibclogo XVI International Botanical Congess


Abstract Number: 3359
Session = 16.3.7


MUSHROOM BIOGEOGRAPHY: THE SEARCH FOR WALLACE'S LINE IN FUNGI


R. Vilgalys, J.-M. Moncalvo, T. Y. James, S.-R. Liou, J. E. Johnson. Dept. of Botany, Duke University, NC


Combined study of mushroom phylogeny and biogeography is providing a framework for understanding the relationship among different components of speciation. Groups with rich phylogeographic histories include Pleurotus, Ganoderma, Schizophyllum, and Xeromphalina. Phylogenetic analyses of geographically diverse populations shows that speciation is primarily allopatric in mode, however, gene flow between widely isolated locations is evident, and repeated dispersal to distant provenances may provide opportunities for biodiversification through repeated rounds of allopatric speciation. Older species lineages are also likely to have broader distributions than recently evolved groups, and may represent the vestiges of taxonomic groups that existed prior to the breakup of the major continents 200 million years ago.


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