Inferring phylogeny and speciation of Gymnosporangium species,and their coevolution with host plants

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• 英文论文题名：Inferring phylogeny and speciation of Gymnosporangium species,and their coevolution with host plants
• 论文作者：Lei Cai ; Peng Zhao ; Fang Liu ; Ying-Ming Li
• 英文论文作者：Lei Cai ; Peng Zhao ; Fang Liu ; Ying-Ming Li ; State Key Laboratory of Mycology ; Institute of Microbiology ; Chinese Academy of Sciences
• 年：2016
• 作者机构：State Key Laboratory of Mycology,Institute of Microbiology,Chinese Academy of Sciences;
• 英文论文关键词：Cedar-apple rust ; cospeciation ; host alternation ; Pucciniales ; species delimitation
• 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：S436.611
• 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：1
• 文件大小：724k
• 原文格式：D
• 会议级别：全国

摘要

Gymnosporangium species(Pucciniaceae,Pucciniales) cause serious diseases and significant economic losses to apple cultivars.Most of the reported species are heteroecious and complete their life cycles on two different plant hosts belonging to two unrelated genera,i.e.Juniperus and Malus.However,the phylogenetic relationships among Gymnosporangium species and the evolutionary history of Gymnosporangium on its aecial and telial hosts were still undetermined.In this study,we recognized species based on r DNA sequence data by using coalescent method of generalized mixed Yule-coalescent(GMYC) and Poisson Tree Processes(PTP) models.The evolutionary relationships of Gymnosporangium species and their hosts were investigated by comparing the cophylogenetic analyses of Gymnosporangium species with Malus species and Juniperus species,respectively.The concordant results of GMYC and PTP analyses recognized 14 species including 12 known species and two undescribed species.In addition,host alternations of 10 Gymnosporangium species were uncovered by linking the derived sequences between their aecial and telial stages.This study revealed the evolutionary process of Gymnosporangium species,and clarified that the aecial hosts played more important roles than telial hosts in the speciation of Gymnosporangium species.Host switch,losses,duplication and failure to divergence all contributed to the speciation of Gymnosporangium species.
Gymnosporangium species(Pucciniaceae,Pucciniales) cause serious diseases and significant economic losses to apple cultivars.Most of the reported species are heteroecious and complete their life cycles on two different plant hosts belonging to two unrelated genera,i.e.Juniperus and Malus.However,the phylogenetic relationships among Gymnosporangium species and the evolutionary history of Gymnosporangium on its aecial and telial hosts were still undetermined.In this study,we recognized species based on r DNA sequence data by using coalescent method of generalized mixed Yule-coalescent(GMYC) and Poisson Tree Processes(PTP) models.The evolutionary relationships of Gymnosporangium species and their hosts were investigated by comparing the cophylogenetic analyses of Gymnosporangium species with Malus species and Juniperus species,respectively.The concordant results of GMYC and PTP analyses recognized 14 species including 12 known species and two undescribed species.In addition,host alternations of 10 Gymnosporangium species were uncovered by linking the derived sequences between their aecial and telial stages.This study revealed the evolutionary process of Gymnosporangium species,and clarified that the aecial hosts played more important roles than telial hosts in the speciation of Gymnosporangium species.Host switch,losses,duplication and failure to divergence all contributed to the speciation of Gymnosporangium species.

引文

Kern FD,1973.A revised taxonomic account of Gymnosporangium.University Park,Pennsylvania,USA:Penn State University Press.
    Zhuang JY,Wei SX,Wang YC,2012.Flora fungorum sinicorum.Vol.41.Uredinales IV.Beijing,China:Science Press.