SolRgene

Late blight caused by Phytophthora infestans is one of the most devastating diseases in potato cultivation and is mostly controlled by the application of chemicals. However, introduction of combinations of resistance (R) genes conferring broad-spectrum resistance from wild Solanum species into cultivated potatoes is considered the most practical and promising approach to achieve durable resistance.

In this project we describe an extensive survey of more than 1,000 accessions belonging to the Solanum section Petota. We screened approximately 5,000 genotypes with a high throughput in vitro inoculation system with P. infestans isolate 90128, generally 5 genotypes per accession. Selected genotypes were also tested in detached leaf assays with the same isolate, and with another aggressive isolate IPO-C. Also multi-year field trials were performed with isolate IPO-C.

From these screenings, resistant genotypes were selected, and crossed with susceptible genotypes. Subsequent genetic analysis of populations for segregation of resistance has yielded a great variation of new R genes. Recently, a few of the newly identified R genes have been cloned, and more will follow in the near future.

All options under the menu Phytophtora resistance allows you to specifically mine those species/accessions/genotypes for which P. infestanse disease assays have been performed.

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