Genetic diversity in parthenogenetic triploid Paragonimus westermani

Van Herwerden, Lynne, Blair, David, and Agatsuma, Takeshi (1999) Genetic diversity in parthenogenetic triploid Paragonimus westermani. International Journal for Parasitology, 29 (9). pp. 1477-1482.

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Abstract

Paragonimus westermani is a medically important foodborne trematode occurring throughout southeast Asia. We have used molecular techniques to test the hypothesis that the parthenogenetic triploid form of P. westermani has arisen only once. Sources of data for comparison were: (a) restriction fragment length polymorphisms (RFLPs) of ribosomal internal transcribed spacers (ITS); and (b) 'fingerprint' patterns observed when genomic digests were probed with simple sequence repeats (ATT)₁₀ and (ATGT)₇. In all cases there were distinct differences among triploid isolates from southwest Japan, northeast China and Korea. These findings are considered in the context of previous cytogenetic, allozyme, mitochondrial-RFLP and partial cytochrome c-oxidase subunit I (COI) sequence studies and indicate that triploid lineages may have arisen independently on more than one occasion. We favour this view. An alternative explanation is that the triploids did have a single origin, but that different clonal lineages have undergone subsequent mutations.

Item ID: 28285
Item Type: Article (Research - C1)
ISSN: 1879-0135
Keywords: Paragonimus westermani, parthenogenetic, triploidy, ITS, microsatellite fingerprinting
Date Deposited: 31 Jul 2013 23:42
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060302 Biogeography and Phylogeography @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960805 Flora, Fauna and Biodiversity at Regional or Larger Scales @ 50%
92 HEALTH > 9204 Public Health (excl. Specific Population Health) > 920404 Disease Distribution and Transmission (incl. Surveillance and Response) @ 50%
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