论文摘要
Didymellaceae（Pleosporales, Dothideomycetes） is one of the most species-rich families in the fungal kingdom. Species of Didymellaceae are geographically widespread and distribute in numerous ecological niches.Although most species have been shown to be important plant pathogens, with six species of quarantine significance, many species also infect human, insects, fungi or inhabit a wide range of other substrates as saprophytes. The taxonomy of Didymellaceae has undergone significant changes in recent years via morphological and phylogenetic analyses based on DNA sequence data of ex-type strains. Several poly-and paraphyletic genera, including Phoma, Didymella, and Ascochyta were redefined, along with the introductions of new genera. However, due to the tradition of host associated nomenclature, the wide host range and the widespread presence of Didymellaceae, taxonomy of the majority of species in this family remain unsolved and the real species diversity is largely unknown. To further resolve the phylogenetic relationships of Didymellaceae,in the present study, a systematic analysis of this family was carried out based on the hitherto largest number of cultures with a global distribution and diverse substrates. Total 1130 Didymellaceae strains from 76 countries, 98 plant families and 55 other substrates, including animals, fungi, soil, air, water, paint, glacier, were examined. The resulting phylogenetic tree of four loci（ITS, LSU, rpb2, tub2） resolved 38 well supported genera and recognized287 species. Among them, 7 new genera, 30 new species from plants, soil, coral, house dust were introduced.Besides, 20 new combinations were proposed, and five epitypes and four neotypes were designated to stabilize the taxonomy and use of elder names. On this basis, an extended phylogenetic backbone for Didymellaceae based on a more complete sequences dataset was generated, aiming to help the delimitation of novelties at the species,genus and family levels. In addition, rpb2 was recommended as the most effective locus for the identification of Didymellaceae to the species level. Moreover, an efficient workflow was provided for the fast and reliable identification of Didymellaceae.
论文目录
文章来源
类型: 国内会议
作者: L.W.Hou,J.Z.Groenewald,P.W.Crous,L.Cai
来源: 多彩菌物 美丽中国——中国菌物学会2019年学术年会 2019-08-03
年度: 2019
分类: 基础科学
专业: 生物学,生物学
单位: Chinese Academy of Sciences, Institute of Microbiology,State Key Laboratory of MycologyUniversity of Chinese Academy of SciencesWesterdijk Fungal Biodiversity InstituteUtrecht University, Department of Biology, Microbiology
分类号: Q949.32
DOI: 10.26914/c.cnkihy.2019.002262
页码: 355
总页数: 1
文件大小: 783k
下载量: 13