| Russula Pers.are widely distributed throughout the world and form ectomycorrhizae in symbiosis with a variety of plant roots,playing an important role in the maintenance of forest ecosystem diversity and community building.The diversity of vegetation types and the multiplicity of zonal components in Tibet has resulted in an exceptionally rich diversity of mycorrhizal fungi.There have been many studies on the diversity of Russula in Tibet,but most of them are morphological descriptions or list reports only,without molecular evidence or documented specimens,and there are also cases of synonymy,so the species diversity of Russula in Tibet needs further clarification.In this study,based on extensive collection of species of Russula,a combination of classical morphology and molecular phylogeny was used to define the species based on a thorough understanding of the main evolutionary clades within the genus and the systematic affinities among species,thus clarifying the species diversity of Russula in Tibet,defining the composition and distribution of related resources,and laying a solid foundation for the rational conservation and exploitation of macrofungal resources in Tibet.From 2021 to 2022,157 species of Russula were collected in Tibet,and 20 species(including two proposed new species)were identified by morphological and molecular phylogenetic studies,belonging to 5 subgenera,namely R.aeruginea,R.ayubiana,R.cavipes,R.chiui,R.choptae,R.compactoides,R.cremicolor,R.formula,R.graminea,R.indohimalayana,R.kangchenjungae,R.pseudokrombholzii,R.pseudopectinatoides,R.puellaris,R.roseola,R.senecis,R.subalpinogrisea,R.thindii,2 new species proposed,R.yadongensis,R.shigatseensis;A further nine species are reported in the literature as being supported by morphological and molecular phylogenies,R.atroaeruginea,R.exalbicans,R.leucomarginata,R.medullata,R.rhodochroa,R.rufa,R.sichuanensis,R.tengii,R.vesca.Accordingly,the present study identifies a total of 29 species of Russula in Tibet at present. |
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