RT Journal Article SR Electronic(1) A1 Prokchorchik, Maxim A1 Pandey, Ankita A1 Moon, Hayoung A1 Kim, Wanhui A1 Jeon, Hyelim A1 Jung, Gayoung A1 Jayaraman, Jay A1 Poole, Stephen A1 Segonzac, Cécile A1 Sohn, Kee Hoon A1 McCann, Honour C.YR 2020 T1 Host adaptation and microbial competition drive Ralstonia solanacearum phylotype I evolution in the Republic of Korea JF Microbial Genomics, VO 6 IS 11 OP SP e000461 DO https://doi.org/10.1099/mgen.0.000461 PB Microbiology Society, SN 2057-5858, AB Bacterial wilt caused by the Ralstonia solanacearum species complex (RSSC) threatens the cultivation of important crops worldwide. We sequenced 30 RSSC phylotype I ( R. pseudosolanacearum ) strains isolated from pepper (Capsicum annuum) and tomato (Solanum lycopersicum) across the Republic of Korea. These isolates span the diversity of phylotype I, have extensive effector repertoires and are subject to frequent recombination. Recombination hotspots among South Korean phylotype I isolates include multiple predicted contact-dependent inhibition loci, suggesting that microbial competition plays a significant role in Ralstonia evolution. Rapid diversification of secreted effectors presents challenges for the development of disease-resistant plant varieties. We identified potential targets for disease resistance breeding by testing for allele-specific host recognition of T3Es present among South Korean phyloype I isolates. The integration of pathogen population genomics and molecular plant pathology contributes to the development of location-specific disease control and development of plant cultivars with durable resistance to relevant threats., UL https://www.microbiologyresearch.org/content/journal/mgen/10.1099/mgen.0.000461