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Genomic variability within laboratory and wild isolates of the trichostrongyle mouse nematode Heligmosomoides polygyrus

Published online by Cambridge University Press:  12 April 2024

M.A. Abu-Madi*
Affiliation:
School of Biological Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 OEX, UK: Department of Applied Sciences, Faculty of Technology, Qatar University, PO Box 2713, Doha, Qatar:
S.N. Mohd-Zain
Affiliation:
School of Biological Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 OEX, UK: Institute of Biological Sciences, University of Malaya, Kuala Lumpur, Malaysia:
J.W. Lewis
Affiliation:
School of Biological Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 OEX, UK:
A.P. Reid
Affiliation:
CABI Biosciences (UK Centre), Egham, Surrey, TW20 9TY, UK
*
*Fax: (0974) 820337 E-mail: abumadi@qu.edu.qa

Abstract

PCR-RFLP techniques have been used to characterize wild and laboratory isolates of the trichostrongyle nematode Heligmosomoides polygyrus from the wood mouse Apodemus sylvaticus and the laboratory mouse Mus musculus respectively. Both isolates can be distinguished by eight endonuclease digestions of the ITS region of the rDNA repeat namely, Alu I, Dde I, Hpa II, Hae III, Hinf I, Hha I, Pvu II and Sal I. In two of the digests, Hinf I and Rsa I, a minor polymorphism was observed in the wild isolate of H. polygyrus which has been cultured in laboratory-bred A. sylvaticus for several generations when compared with H. p. polygyrus from wild A. sylvaticus. A minor polymorphism was also identified in further wild isolates of H. polygyrus collected from A. sylvaticus in a field site in Egham, Surrey. However no evidence of polymorphism was observed in the laboratory isolate of H. polygyrus from the CD1 strain of M. musculus and the laboratory-bred A. sylvaticus. Reasons for this are discussed and further studies on the population genetics of H. polygyrus are suggested.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2000

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