Host adaptation and microbial competition drive phylotype I evolution in the Republic of Korea Open Access

Abstract

Bacterial wilt caused by the species complex (RSSC) threatens the cultivation of important crops worldwide. We sequenced 30 RSSC phylotype I () strains isolated from pepper () and tomato () 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 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.

Funding
This study was supported by the:
  • Max Planck Society
  • National Research Foundation, Republic of Korea Ministry of Science and ICT (Award NRF-2019R1A2C2084705)
  • Rural Development Administration, Republic of Korea Ministry of Science and ICT (Award 2018R1A5A1023599)
  • Marsden Fast-Start, Royal Society of New Zealand (Award MAU1709)
  • Creative-Pioneering Researchers, Seoul National University
  • Plant Molecular Breeding Center, Next-Generation BioGreen 21 Program (Award PJ01317501)
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2020-11-05
2024-03-28
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