Muti-locus phylogeny and divergence time analyses of Russula from China

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• 英文论文题名：Muti-locus phylogeny and divergence time analyses of Russula from China
• 论文作者：Guo Jie Li ; Hua An Wen ; Fu Cheng Lin ; Rui Lin Zhao
• 英文论文作者：Guo Jie Li ; Hua An Wen ; Fu Cheng Lin ; Rui Lin Zhao ; State Key Laboratory of Mycology ; Institute of Microbiology ; Chinese Academy of Sciences ; State Key Laboratory of Rice Biology ; Institute of Biotechnology ; Zhejiang University
• 年：2016
• 作者机构：State Key Laboratory of Mycology,Institute of Microbiology,Chinese Academy of Sciences;State Key Laboratory of Rice Biology,Institute of Biotechnology,Zhejiang University;
• 英文论文关键词：Russulaceae ; divergence times ; multigene phylogenetics ; systematics ; taxonomy
• 会议召开时间：2016-08-19
• 会议录名称：中国菌物学会2016年学术年会论文摘要集
• 英文会议录名称：Abstracts of 2016 Mycological Society of China Annual Meeting
• 语种：英文
• 分类号：S646
• 学会代码：ZGVL
• 会议名称：中国菌物学会2016年学术年会
• 会议地点：中国福建福州
• 主办单位：中国菌物学会
• 学会名称：中国菌物学会
• 页数：2
• 文件大小：575k
• 原文格式：D
• 会议级别：全国

摘要

The genus Russula is a group containing more than 760 species in the world,including many species of edible,medicinal and other economic value.Members of Russula form symbiotic association of mycorrhizae with roots of various species of shrubs and both coniferous and deciduous trees,playing an important role in ecosystem.This genus is split into 11 subgenera in the current taxonomic systems of Russula,which are mainly based on morphological characteristics,such as pileus color,context taste,color of spore print,presence of dermatocystidia and primordial hyphae,and size of basidia and cystidia.The quite limited molecular phylogeny works are only based on ITS and LSU sequences analyses from several subgenera previously.The existence of huge number of species,highly variable phenotype and deficient phylogenetic study results Russula is becoming a difficult group in systematic research.In this study,a comprehensive phylogenetic analyses based on ITS,n LSU,tef-1α,mt SSU,rpb1 and rpb2 sequences(all are newly generated from this research) derived from 256 Russula specimens in China which represent 161 species from all known 11 subgenera and 26 sections are conducted.Molecular clock dating analysis using BEAST v1.8.3 based on those 6 genes reveal the divergence times of Russula and related subgenera and sections.The divergence time is introduced as one of universal standardized criteria in taxa ranking as those of previous study in Agaricus.This research shows the known subgenera Brevipes,Ingratula,Malodora,Russula and Tenellula are generally monophyletic groups,subgenera Coccinula,Compacta,Heterophyllidia,Incrustatula,Insidiosula and Polychromidia are obviously polyphyletic.In order to accommodation those new discoveries,a revised taxonomic system of Rususla is proposed,which composed of 5 new subgenera,sections Amethystina,Indolenta,Maculata,Rosea and Virdanta are raised into subgenera level,and along with 35 new species.Finally,the revised taxonomic system of genus Russula has 14 subgenera,31 sections.
The genus Russula is a group containing more than 760 species in the world,including many species of edible,medicinal and other economic value.Members of Russula form symbiotic association of mycorrhizae with roots of various species of shrubs and both coniferous and deciduous trees,playing an important role in ecosystem.This genus is split into 11 subgenera in the current taxonomic systems of Russula,which are mainly based on morphological characteristics,such as pileus color,context taste,color of spore print,presence of dermatocystidia and primordial hyphae,and size of basidia and cystidia.The quite limited molecular phylogeny works are only based on ITS and LSU sequences analyses from several subgenera previously.The existence of huge number of species,highly variable phenotype and deficient phylogenetic study results Russula is becoming a difficult group in systematic research.In this study,a comprehensive phylogenetic analyses based on ITS,n LSU,tef-1α,mt SSU,rpb1 and rpb2 sequences(all are newly generated from this research) derived from 256 Russula specimens in China which represent 161 species from all known 11 subgenera and 26 sections are conducted.Molecular clock dating analysis using BEAST v1.8.3 based on those 6 genes reveal the divergence times of Russula and related subgenera and sections.The divergence time is introduced as one of universal standardized criteria in taxa ranking as those of previous study in Agaricus.This research shows the known subgenera Brevipes,Ingratula,Malodora,Russula and Tenellula are generally monophyletic groups,subgenera Coccinula,Compacta,Heterophyllidia,Incrustatula,Insidiosula and Polychromidia are obviously polyphyletic.In order to accommodation those new discoveries,a revised taxonomic system of Rususla is proposed,which composed of 5 new subgenera,sections Amethystina,Indolenta,Maculata,Rosea and Virdanta are raised into subgenera level,and along with 35 new species.Finally,the revised taxonomic system of genus Russula has 14 subgenera,31 sections.

引文

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