Stacking host resistance genes to control Globodera pallida populations with different virulence

Abstract Potato Cyst Nematodes (PCN) are a globally important and economically extremely damaging potato pest. Chemical control has limited impact cannot clear field of PCN, but genetic resistance in potatoes is an effective part natural management PCN. There two closely related species PCN; Globodera rostochiensis against which the H1 gene from S. tuberosum ssp. andigena (CPC 1673) proven Europe for several decades, G. pallida varieties with also commercially available. However, resistant genotypes mainly to processing most grown still susceptible species. The number suitable led its spread throughout UK now infestations Scottish seed land threatening future production. Novel sometimes combine PCN resistances more than one parental source. Multiplication panel populations differ virulence host were compared on recently developed breeding lines single or stacked genes. multiple genes show reduced multiplication pathotypes that able overcome gene.