Annals of Applied Biology (2020) 176, 122-129

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Kristiina Mäkinen (2020)
Plant susceptibility genes as a source for potyvirus resistance
Annals of Applied Biology 176 (2), 122-129
Abstract: Virus infection depends on the resources provided by the host plant. A number of host proteins that enable potyvirus infection have been identified. The genes encoding them are called susceptibility genes (S-genes). Loss-of-susceptibility type of resistance is based on S-gene modifications leading to incompatible host–virus interactions. An increasing number of examples show that this is a viable method for resistance breeding. While the recent advancements in genome editing and sequencing have remarkably reduced the technical limitations, we still need to tackle many biological challenges to be able to utilise S-genes for durable and broad range potyvirus resistance to their full extent. Many lessons on functional redundancy between gene family members and durability of the resistance have been learned by studying the naturally occurring recessive resistance based on the interplay between eukaryotic initiation factors eIF4E and eIFiso4E and viral protein genome-linked (VPg). Nevertheless, the outcomes of the S-gene modifications on resistance or any other characteristic of the host plant cannot be predicted. In addition to the genetic background of the host, also the properties of the viral factors affect the efficiency of the resistance and the emergence of resistance-breaking mutations. Many potyviral protein–protein interactions occur in multiprotein complexes. This suggests that the susceptibility factors may interact with viral proteins as a part of multifaceted protein–protein interaction networks. Rather than reviewing exhaustively the S-genes involved in potyvirus infection, my intention here is to discuss in the light of selected examples, the prospects and challenges of the use of potyviral S-genes in resistance breeding.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website


Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.
Potato virus Y
Plum pox virus
Turnip mosaic virus
Watermelon mosaic virus