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学科主题: 临床医学
题名:
The origin of the triploid in Paragonimus westermani on the basis of variable regions in the mitochondrial DNA
作者: Agatsuma, T; Iwagami, M; Sato, Y; Iwashita, J; Hong, SJ; Kang, SY; Ho, LY; Su, KE; Kawashima, K; Abe, T
刊名: JOURNAL OF HELMINTHOLOGY
发表日期: 2003-12-01
DOI: 10.1079/JOH2003185
卷: 77, 期:4, 页:279-285
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Parasitology ; Zoology
研究领域[WOS]: Parasitology ; Zoology
关键词[WOS]: LUNG FLUKE ; TETRAPLOIDS ; CHINA
英文摘要:

Triploid, parthenogenetic forms of the lungfluke, Paragonimus westermani, occur in Japan, Korea and China. The origin(s) of triploidy has been debated over the years. Sequences of two regions in the mitochondrial DNA, i.e. partial lrRNA (16S), and a portion of the non-coding region, were obtained from natural populations of P. westermani. All triploid individuals (Japan, Korea, China) and a single tetraploid individual (China) had identical sequences in the 16S region studied. Some sequence variation was observed among diploids, with those from Taiwan being distinct from the remainder. Both neighbour joining and parsimony trees using the 16S region placed diploid individuals from southwestern Japan close to the triploids and the tetraploid. The fragment amplified from the mitochondrial non-coding region showed dimorphism. One form (type A) consisted of 239 bp comprising two identical tracts of 70 bp separated by a tract of 93 bp. The second form (Type B) consisted of only a single 70 bp tract. All diploid individuals from Taiwan, China and Korea possessed type A, while those from Japan were polymorphic; individuals from Oita and Hyogo had type B, those from Chiba had type A, but both types were found in Mie. On the other hand, all of the triploid individuals and two tetraploid individuals possessed type B. Both the form present in the non-coding region and the 16S sequence suggest an affinity between a south-eastern group of diploid populations in Japan and the triploid form. A possible mechanism responsible for the origin of the triploid is discussed.

语种: 英语
WOS记录号: WOS:000186699800001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/67696
Appears in Collections:北京大学第二临床医学院_期刊论文

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作者单位: 1.Beijing Med Univ, Peoples Hosp, Beijing 100034, Peoples R China
2.Kyushu Univ, Sch Hlth Sci, Fukuoka 8128582, Japan
3.Kochi Med Sch, Dept Environm Hlth Sci, Nankoku, Kochi 7838505, Japan
4.Akita Prefectural Univ, Dept Mol Biol, Akita 0100195, Japan
5.Chung Ang Univ, Coll Med, Dept Parasitol, Seoul 156756, South Korea
6.Natl Taiwan Univ, Coll Med, Dept Parasitol, Taipei 10764, Taiwan

Recommended Citation:
Agatsuma, T,Iwagami, M,Sato, Y,et al. The origin of the triploid in Paragonimus westermani on the basis of variable regions in the mitochondrial DNA[J]. JOURNAL OF HELMINTHOLOGY,2003,77(4):279-285.
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