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Nematodes from the Victoria Land coast, Antarctica and comparisons with cultured Panagrolaimus davidi

Published online by Cambridge University Press:  13 May 2013

Mélianie R. Raymond ,
David A. Wharton  and
Craig J. Marshall
Mélianie R. Raymond
Affiliation:
Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
David A. Wharton*
Affiliation:
Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand
Craig J. Marshall
Affiliation:
Department of Biochemistry, University of Otago, PO Box 56, Dunedin, New Zealand
*
*Corresponding author: david.wharton@otago.ac.nz
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Abstract

Morphological and genetic information was used to determine the species identity and relationships of four species of nematodes from the Victoria Land coast, Antarctica; and between laboratory and field populations of Panagrolaimus davidi Timm. The 18S and D3 expansion segments of 28S rRNA were successfully amplified from the four species: Scottnema lindsayae Timm, Plectus murrayi Yeates, Eudorylaimus spp. and Panagrolaimus davidi. The four species from field populations mapped to three different nematode clades, indicating that if they are survivors in, rather than colonizers of, Antarctica they originate from several Gondwanan ancestors. The laboratory culture of P. davidi is shown to be a different species to that of the field samples of P. davidi, which were genetically identical to each other. There are several possible explanations for this observation, which require further investigation.

Keywords

Eudorylaimus sp.field and laboratory strainPlectus murrayiScottnema lindsayae
Type
Biological Sciences
Information
Antarctic Science , Volume 26 , Issue 1 , February 2014 , pp. 15 - 22
Copyright
Copyright © Antarctic Science Ltd 2013 

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