Host adaptation and microbial competition drive Ralstonia solanacearum phylotype I evolution in the Republic of Korea

• DOI: 10.1099/mgen.0.000461
• Publication Date: 2020-11-05T16:22:38Z
• Authors: Maxim Prokchorchik; Ankita Pandey; Hayoung Moon; Wanhui Kim; Hyelim Jeon; Gayoung Jung; Jay Jayaraman; Stephen Poole; Cécile Segonzac; Kee Hoon Sohn; Honour C. McCann
• Keywords: Phylotype; Ralstonia solanacearum; Bacterial wilt

Bacterial wilt caused by the Ralstonia solanacearum species complex (RSSC) threatens cultivation of important crops worldwide. We sequenced 30 RSSC phylotype I ( R. pseudosolanacearum ) strains isolated from pepper Capsicum annuum and tomato Solanum lycopersicum across Republic Korea. These isolates span diversity I, have extensive effector repertoires are subject to frequent recombination. Recombination hotspots among South Korean include multiple predicted contact-dependent inhibition loci, suggesting that microbial competition plays a significant role in evolution. Rapid diversification secreted effectors presents challenges for development disease-resistant plant varieties. identified potential targets disease resistance breeding testing allele-specific host recognition T3Es present phyloype isolates. The integration pathogen population genomics molecular pathology contributes location-specific control cultivars with durable relevant threats.