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Proc Natl Acad Sci U S A. 2012 Jul 10;109(28):E1972-9. doi: 10.1073/pnas.1208003109. Epub 2012 Jun 13.

High-throughput genomic sequencing of cassava bacterial blight strains identifies conserved effectors to target for durable resistance.

Author information

1
Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA.

Erratum in

  • Proc Natl Acad Sci U S A. 2013 Dec 3;110(49):19969.
  • Proc Natl Acad Sci U S A. 2012 Aug 7;109(32):13130.

Abstract

Cassava bacterial blight (CBB), incited by Xanthomonas axonopodis pv. manihotis (Xam), is the most important bacterial disease of cassava, a staple food source for millions of people in developing countries. Here we present a widely applicable strategy for elucidating the virulence components of a pathogen population. We report Illumina-based draft genomes for 65 Xam strains and deduce the phylogenetic relatedness of Xam across the areas where cassava is grown. Using an extensive database of effector proteins from animal and plant pathogens, we identify the effector repertoire for each sequenced strain and use a comparative sequence analysis to deduce the least polymorphic of the conserved effectors. These highly conserved effectors have been maintained over 11 countries, three continents, and 70 y of evolution and as such represent ideal targets for developing resistance strategies.

PMID:
22699502
PMCID:
PMC3396514
DOI:
10.1073/pnas.1208003109
[Indexed for MEDLINE]
Free PMC Article

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