Picard D. auteur aut IRD Sempéré Thierry auteur aut IRD Plantard O. auteur aut IRD text journalArticle eng text/pdf born digital access The cyst nematode Globodera pallida is a major pest of potato in South America where this specialist parasite is native. To investigate its phylogeography, we have genotyped individuals from 42 Peruvian populations using mitochondrial and nuclear molecular markers. A clear south-to-north phylogeographical pattern was revealed with five well-supported clades. The clade containing the southern populations is genetically more diverse and forms the most basal branch. The large divergence among cytochrome b haplotypes suggests that they diverged before human domestication of potato. As the nematodes studied have been sampled on cultivated potato, multiple host-shifts from wild to cultivated potatoes must have occurred independently in each clade. We hypothesise that this south-to-north pattern took place during the uplift of the Andes beginning 20 My ago and following the same direction. To our knowledge, this is the first study of a plant parasite sampled on cultivated plants revealing an ancient phylogeographical pattern. specialized phylogeography South America Andean uplift cytochrome b plant parasitic nematode Globodera pallida Solanum tuberosum 076 42 2 308-316 2007 1055-7903 https://www.documentation.ird.fr/hor/fdi:010037849 10.1016/j.ympev.2006.06.018 1055-7903 [F B010037849] https://www.documentation.ird.fr/hor/fdi:010037849 https://www.documentation.ird.fr/intranet/publi/2007/03/010037849.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2007-03-30 2017-08-23 fdi:010037849 fre