Polymorphic DNA markers in the genome of parasitic nematodes

Polymorphic molecular markers are being identified to characterize the genomes of parasitic nematodes. The aim is to construct a map with markers evenly spread over the six chromosomes. With such a map, regions can be identified that are under selection pressure when attempts are being made to eradi...

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Bibliographic Details
Published inJournal of helminthology Vol. 72; no. 4; p. 291
Main Authors Roos, M H, Hoekstra, R, Plas, M E, Otsen, M, Lenstra, J A
Format Journal Article
LanguageEnglish
Published England 01.12.1998
Subjects
Animals
DNA, Helminth - genetics
Genetic Markers
Genome
Haemonchus - genetics
Nematoda - genetics
Polymorphism, Genetic
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Summary:Polymorphic molecular markers are being identified to characterize the genomes of parasitic nematodes. The aim is to construct a map with markers evenly spread over the six chromosomes. With such a map, regions can be identified that are under selection pressure when attempts are being made to eradicate worms, be it by drugs, vaccines or genetic resistance in the sheep. Several types of markers have been developed, microsatellites, transposon-associated markers, amplified fragment length polymorphism (AFLP) and expressed sequence tag (EST) markers. Linkage groups can be constructed using several genetic crosses between inbred and drug resistant strains. EST markers will be especially important for comparative mapping with the genome of Caenorhabditis elegans, and therefore localization of the linkage group on a chromosome. It will then be possible to identify functional genes close to markers that have changed allele frequencies under selection pressure and identify the mechanisms of resistance to parasite control.
ISSN:0022-149X
DOI:10.1017/S0022149X0001662X