title: Intraspecific phylogeography of Carchesium polypinum (Peritrichia, Ciliophora) from China, inferred from 18S-ITS1-5.8S ribosomal DNA.
abstract: Based on the variation of site 34, 46, 241, 305 and 322 in the 18S-ITS1 rDNA sequence, 19 Carchesium polypinum populations collected from eight provinces of China were separated into northern and southern population along the delineation between the Yangtze River and the Pearl River. This geographic distribution pattern of Carchesium polypinum maybe results from two factors: the vicariance resulting from the formation of the delineation between the Pearl River and the Yangtze River accompanied with the uplift of Qinghai-Xizang Plateau, and the different dispersal paths of C. polypinum affected by the climate.
authors.affiliation: Donghu Experimental Station of Lake Ecosystems, Chinese Academy of Sciences, Wuhan 430072, China.
authors.forename: Miao
authors.initials: M
authors.lastname: Wei
authors.forename: Yu
authors.initials: Y
authors.lastname: Yuhe
authors.forename: Shen
authors.initials: S
authors.lastname: Yunfen
authors.forename: Zhang
authors.initials: Z
authors.lastname: Xiyuan
mesh_terms: D000818:Animals; D001483:Base Sequence; D002681:China; D002980:Climate; D016054:DNA, Protozoan / Q000235:genetics*; D004275:DNA, Ribosomal / Q000235:genetics*; D021903:DNA, Ribosomal Spacer / Q000235:genetics; D019143:Evolution, Molecular; D014644:Genetic Variation; D005828:Genetics, Population; D016802:Oligohymenophorea / Q000235:genetics* / Q000302:isolation & purification; D010802:Phylogeny
chemical_list: D016054:DNA, Protozoan; D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer