Europe as a secondary distribution hub in the worldwide invasion of the potato cyst nematode <I>Globodera rostochiensis</i>
2024
Esquibet, Magali | Mwangi, James, M. | Kiewnick, Sebastian | Wang, Xiaohong | Mimee, Benjamin | Handayani, Nurul, Dwi | Bert, Wim | Helder, Johannes | Wainer, John | Sakata, Itaru | Garcia, Nathan | Grenier, Eric | Montarry, Josselin | Institut de Génétique, Environnement et Protection des Plantes (IGEPP) ; Université de Rennes (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Rennes Angers ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) | Chuka University | Julius Kühn-Institut (JKI) | Cornell University [Ithaca] (CU) | Agriculture and Agri-Food Canada | Universiteit Gent = Ghent University = Université de Gand (UGENT) | Ministry of Agriculture, Jakarta | Wageningen University and Research [Wageningen] (WUR) | Agriculture Victoria (AgriBio) | National Agriculture and Food Research Organization (NARO) | Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES)
International audience
Show more [+] Less [-]English. The potato cyst nematode Globodera rostochiensis originates from the Andean Mountain region in South America and has unintentionally been introduced to all inhabited continents. Several studies have examined the population genetic structure of this pest in various countries by using microsatellite markers. However, merging microsatellite data produced from different laboratories is challenging and can introduce uncertainty when interpreting the results. To overcome this challenge and to explore invasion routes of this pest, we have genotyped 22 G. rostochiensis populations from all continents. Within populations, the highest genetic diversity was observed in the South American populations, the European populations showed an intermediate level of genetic diversity and the remaining populations were the less diverse. This confirmed pre-existing knowledge such as a first introduction event from South America to Europe, but the less diverse populations could originate either from South America or from Europe. At the continental scale, STRUCTURE genetic clustering output indicated that North America and Asia have experienced at least two introduction events. Comparing different evolutionary scenarios, the Approximate Bayesian Computation analysis showed that Europe served as a secondary distribution centre for the invasion of G. rostochiensis into all other continents (North America, Africa, Asia and Oceania).
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