INTER AND INTRA-SPECIFIC GENOMIC VARIABILITY OF THE POTATO CYST NEMATODES GLOBODERA-PALLIDA AND G-ROSTOCHIENSIS FROM EUROPE AND SOUTH-AMERICA USING RAPD-PCR

Eleven populations of the potato cyst nematode Globodera pallida from the UK and Peru were analyzed and compared using RAPD-PCR with four 10 -mer primers. fn addition, seven populations of G. rostochiensis from the UK and single populations from Germany, the Netherlands and Bolivi a were included for comparison. Genomic variability was found both bet ween and within species, with more variability in G, pallida than G. r ostochiensis. The genomic pool of British G. pallida populations showe d considerably less variation than the Peruvian populations, with 73% and 41% similarity between populations respectively. The genomic simil arity among populations of G, rostochiensis was 89% for UK populations and 82% when the two continental European populations were included. Nevertheless, between populations within each species and from the sam e locality, genomic differences were still found.