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	Widespread interspecies homologous recombination reveals reticulate evolution within the genus streptomyces
	Cheng, Kun1,2; Rong, Xiaoying1; Huang, Ying1
刊名	Molecular phylogenetics and evolution
	2016-09-01
卷号	102页码:246-254
关键词	Streptomyces Homologous recombination Population genetics Reticulate evolution Multilocus sequence analysis
ISSN号	1055-7903
DOI	10.1016/j.ympev.2016.06.004
通讯作者	Rong, xiaoying(rxy568@126.com) ; Huang, ying(huangy@im.ac.cn)
英文摘要	Homologous recombination is increasingly being recognized as a driving force in microbial evolution. however, recombination in streptomycetes, a rich source of diverse secondary metabolites, particularly among different species, remains minimally investigated. in this study, the largest sample of streptomyces species to date, consisting of 142 type strains spanning the genus, with available sequences of 16s rrna, atpd, gyrb, reca, rpob and trpb genes, were collected and subjected to a comprehensive population genetic analysis to generate an overall estimate of the level of streptomyces interspecies genetic exchange and its effect on the evolution of this genus. the results indicate frequent homologous recombination among streptomyces species, which occurred three times more frequently and was nearly 14 times more important than point mutation in nucleotide sequence divergence (rho/theta(w), = 3.10, r/m = 13.74). as a result, a facilitating effect on the evolutionary process and confusion in phylogenetic relationships were observed, as well as a number of specific transfer events of the six gene fragments. a resultant phylogenetic network depicted extensive horizontal genetic exchange which decays clonality in streptomycetes. moreover, seven evolutionary lineage groups were identified in the present sample in the structure analysis, generally consistent with morphological and physiological data, and the contribution of recombination was detected to be varied among them. our analyses demonstrated a reticulate evolution within streptomyces due to the high level of interspecies gene exchange, which greatly challenges the traditional tree-shaped phylogeny in this genus and may advance our evolutionary understanding of a genuine streptomyces species. (c) 2016 elsevier inc. all rights reserved.
WOS关键词	MULTILOCUS SEQUENCE-ANALYSIS ; DNA-DNA HYBRIDIZATION ; NUMERICAL CLASSIFICATION ; TAXONOMIC EVALUATION ; POPULATION-STRUCTURE ; CLADE ; DIVERSITY ; INFERENCE ; BACTERIA ; SUBSTITUTIONS
WOS研究方向	Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
WOS类目	Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000380622600022
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2375154
专题	中国科学院大学
通讯作者	Rong, Xiaoying; Huang, Ying
作者单位	1.Chinese Acad Sci, Inst Microbiol, State Key Lab Microbial Resources, 1 Beichen West Rd, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Kun,Rong, Xiaoying,Huang, Ying. Widespread interspecies homologous recombination reveals reticulate evolution within the genus streptomyces[J]. Molecular phylogenetics and evolution,2016,102:246-254.
APA	Cheng, Kun,Rong, Xiaoying,&Huang, Ying.(2016).Widespread interspecies homologous recombination reveals reticulate evolution within the genus streptomyces.Molecular phylogenetics and evolution,102,246-254.
MLA	Cheng, Kun,et al."Widespread interspecies homologous recombination reveals reticulate evolution within the genus streptomyces".Molecular phylogenetics and evolution 102(2016):246-254.

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