Quantitative resistance differences between and within natural populations of Solanum chilense against the oomycete pathogen Phytophthora infestans

• DOI: 10.22541/au.161224571.15513526/v1
• Publication Date: 2021-02-02T06:03:13Z
• Authors: Parvinderdeep Kahlon; Melissa Verin; Ralph Hückelhoven; Remco Stam
• Keywords: Phytophthora infestans; Oomycete

The wild tomato species Solanum chilense is divided in geographically and genetically distinct populations that show signs of defense gene selection differential phenotypes when challenged with several phytopathogens, including the oomycete causal agent late blight Phytophthora infestans. To better understand phenotypic diversity this disease resistance S. to assess effect plant genotype vs. pathogen isolate, respectively, we evaluated infection frequency a systematic approach large sample sizes. We studied 85 individuals representing nine separated chilense. This showed differences quantitative properties can be observed between but also within at level individual plants. Data did not reveal clear indications for complete immunity any genotypes. further subset plants against P. infestans isolates diverse virulence properties. confirmed relative were mainly determined by under consideration modest effects isolate used study. Thus, our report suggest natural likely result specific adaptations hosts basal defence responses depend on host are isolate-unspecific.