Molecular Pathogens, 2025, Vol.16, No.6, 257-265 http://microbescipublisher.com/index.php/mp 262 screen materials through molecular markers and genomic association analysis. The International Potato Center (CIP) and relevant national research institutions have made significant contributions in this regard. They have not only provided abundant germplasm resources but also participated in promoting resistance breeding projects of multiple viruses (including PLRV, PVY, and PVX) (Jiang et al., 2020). At present, some multi-resistant varieties that can adapt to the local environment have already been developed. However, in the area of PLRV, the specific resistance genes and their mechanisms of action are not yet particularly clear, and more research is needed to make up for this shortcoming. Figure 2 Potato leaves showing blue staining produced after manual inoculation with PVY-GUS. Blue patches of β-glucuronidase stain, indicating virus replication, are visible (Adopted from Torrance et al., 2020) Image caption: a cv Tacna; b cv Corine; and clones c DB375(1); d 84.2P.75; e HB171(13) and f 99.FT.1b5 (Adopted from Torrance et al., 2020)
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