title: Phylogenetic analysis of the sequences of rDNA internal transcribed spacer (ITS) of Phytophthora sojae.
abstract: The internal transcribed spacer (ITS) region (ITS1, ITS2 and 5.8S rDNA) of the nuclear ribosomal DNA (nrDNA) was amplified via the PCR method in seventeen different isolates of Phytophthora sojae using the common primers of the ITS of fungi. Around 800 bp-1,000 bp fragments were obtained based on the DL2000 marker and the sequences of the PCR products were tested. Taking isolate USA as outgroup, the phylogenetic tree was constructed by means of maximum parsimony analysis, and the genetic evolution among isolates was analyzed. The results showed that there is a great difference between the base constitution of ITS1 and ITS2 among various isolates. The seventeen isolates are classified into three groups, and the isolates from the same region belong to the same group, which shows the variation in geography.
authors.affiliation: Soybean Research Institute of Northeast Agricultural University, Key Laboratory of Soybean Biology of Education Department, Harbin 150030, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Xu
authors.forename: Yingpeng
authors.initials: Y
authors.lastname: Han
authors.forename: Junjiang
authors.initials: J
authors.lastname: Wu
authors.forename: Huiying
authors.initials: H
authors.lastname: Lv
authors.forename: Lijuan
authors.initials: L
authors.lastname: Qiu
authors.forename: Ruzhen
authors.initials: R
authors.lastname: Chang
authors.forename: Limei
authors.initials: L
authors.lastname: Jin
authors.forename: Jinsheng
authors.initials: J
authors.lastname: Wang
authors.forename: Anliang
authors.initials: A
authors.lastname: Yu
authors.forename: Chen
authors.initials: C
authors.lastname: Chen
authors.forename: Haiyang
authors.initials: H
authors.lastname: Nan
authors.forename: Xiuhong
authors.initials: X
authors.lastname: Xu
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.forename: Dayong
authors.initials: D
authors.lastname: Zhang
authors.forename: Shuzhen
authors.initials: S
authors.lastname: Zhang
authors.forename: Wenbin
authors.initials: W
authors.lastname: Li
authors.forename: Weiyuan
authors.initials: W
authors.lastname: Chen
mesh_terms: D001483:Base Sequence; D017931:DNA Primers; D004275:DNA, Ribosomal / Q000032:analysis* / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000032:analysis*; D008969:Molecular Sequence Data; D010802:Phylogeny; D010838:Phytophthora / Q000145:classification* / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000032:analysis / Q000235:genetics; D012340:RNA, Ribosomal, 5.8S / Q000032:analysis / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D017931:DNA Primers; D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer; D012336:RNA, Ribosomal, 16S; D012340:RNA, Ribosomal, 5.8S