Taxonomy And Phylogeny Of Perenniporia In China

ABSTRACTPerenniporia Murrill is a cosmopolitan polypore genus; many new species were described in or transferred to the genus in the last twenty years. Around100species were recorded in this genus worldwide, among them around30species have been found in China. Taxonomy and phytogeny on Chinese Perenniporia were not well done in the previous studies, and it is important to know the species diversity and relationships among these species.Comprehensive studies on the Chinese Perenniporia were carried out. The materials were mostly collected from the different forests all over China, and the minor specimens were made by loans from the major herbaria in China. The modern taxonomic methods were employed in the studies. Molecular technology provides a novel method for fungal taxonomy, especially in fungal phyloheny. Morphological studies combining closely with molecular systematics have become one of the most vital trends for the advancement of taxonomy. Phylogenetic analysis was carried out based on ITS and nu-LSU of Perenniporia, and PAUP*4.0b10and MrBayes3.1.2were used for restructing phylogenetic tree.The illustrated descriptions of41species were given; and studied specimens, host, distribution and remarks of each species were provided. Five species, P. aridula B.K. Cui&C.L. Zhao, P. bannaensis B.K. Cui&C.L. Zhao, P. nanlingensis B.K. Cui&C.L. Zhao, P. substraminea B.K. Cui&C.L. Zhao and P. tibetica B.K. Cui&C.L. Zhao, were described as new; other eleven species, P. africana Ipulet&Ryvarden, P. bambusicola Choeyklin, P. decurrata Corner, P. dendrohyphidia Ryvarden, P. ellipsospora Ryvarden&Gilb., P. gomezii Rajchenb.&J.E. Wright, P. inflexibilis (Berk.) Ryvarden, P. isabellina (Pat. ex Sacc.) Ryvarden, P. straminea (Bres.) Ryvarden, P. vicina (Lloyd) Decock&Ryvarden and P. xantha Decock&Ryvarden, were new to Chinese mycota. These results are the significant contribution for the Chinese polypores taxonomy. Eight clades on studies Perenniporia species were found, and the results show that Perenniporia is multisource, and truncate basidiospores is a reliable taxonomic character in this genus, but rhizomorphic structure can not distinguish the related species. In addition, yellow pore surface is a character for distinguishing species which are not closely related. The phylogenetic trees based on ITS, LUS and ITS+nLSU show that the ITS and ITS+nLSU are suitable for taxonomy at species level, and LUS are suitable at generic level.