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Molecular phylogeny of the entomopathogenic fungi of the genus Cordyceps(Ascomycota:Clavicipitaceae) and its evolutionary implications

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Journal of Systematics and Evolution 2010年第6期48卷 435-444页

作者： 1Li-Hua TIAN 1Bo HU 1Hui ZHOU 2Wei-Ming ZHANG 1Liang-Hu QU 1Yue-Qin CHEN1(Key Laboratory of Gene Engineering of the Ministry of Education,State Key Laboratory of Biocontrol,Zhongshan University,Guangzhou 510275,China) 2(Microbiology Institute of Guangdong(HMIGD),Guangzhou 510070,China) (Key Laboratory of Gene Engineering of the Ministry of Education State Key Laboratory of Biocontrol Zhongshan University Guangzhou 510275 China) (Microbiology Institute of Guangdong (HMIGD) Guangzhou 510070 China)

Cordyceps is an endoparasite ascomycetous genus containing approximately 450 species with a diversity of insect hosts,traditionally included in the family Clavicipitaceae of *** the relationships among species with a varied range of morphologies and hosts is of importance to our understanding of the phylogeny and co-evolution of parasites and hosts in entomopathogenic *** this end,we used a combination of molecular index and morphological characters from 40 representative species to carry out comprehensive molecular phylogenetic *** on the phylogenetic tree,we used the program DISCRETE for inferring the rates of evolution and finding ancestral states of morphological *** phylogenetic analyses revealed two important points.(i) Types of perithecia attached to stroma reflected an evolutionary trend in *** vertically immersed perithecia form was the ancestral state,superficial and obliquely immersed perithecia were derived characters,obliquely immersed was *** with obliquely immersed perithecia were in a closely related group and were the derived group.(ii) A strong correlation between fungal relatedness and the microhabitat supported the hypothesis that the host jumps through commingling in soil *** on the results of these analyses,host switching explains the diversity of entomopathogenic fungi of the genus Cordyceps.

关键词： Cordyceps entomopathogenic fungi evolutionary implication molecular phylogeny.

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