@ARTICLE{TreeBASE2Ref17230, author = {Mary Margaret Robison and Becky Chiang and Paul Arthur Horgen}, title = {A phylogeny of the genus Agaricus based on mitochondrial atp6 sequences.}, year = {2001}, keywords = {Basidiomycete; A. bisporus; parsimony; plasmid}, doi = {}, url = {http://www.jstor.org/stable/3761603}, pmid = {}, journal = {Mycologia}, volume = {93}, number = {1}, pages = {30--37}, abstract = {The genus Agaricus includes the most economically-important, commercially-cultivated mushroom in the world, A. bisporus. Effective efforts to improve A. bisporus through breeding will require a greater understanding of the evolutionary relationships between A. bisporus and other Agaricus species. We present here the complete mitochondrial atp6 gene of A. bitorquis and amplified homologues from 9 other species of Agaricus, including 6 different isolates of A. bisporus. Unexpectedly, only 2 variants of atp6 were found among the 6 isolates of A. bisporus, which had been chosen to represent mitochondrial types thought to be highly divergent based on RFLP data. Although interspecific variation was high, parsimony and maximum likelihood analyses resulted in identical phylogenetic trees for the genus: A. bisporus, A. subfloccosus and A. subperonatus were tightly clustered as a single subgroup, whereas the remaining species were highly divergent. The species representatives with the closest proximity to the A. bisporus cluster were A. bitorquis and A. campestris, which is in agreement with published phylogenies derived from nuclear sequence data. Incongruency between this mitochondrial gene-based phylogeny and a phylogeny of linear mitochondrial plasmids found in these same species indicates separate evolutionary histories for the plasmids and their host mitochondria.} }

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