Species Publications

Publication details

Gene Flow between Divergent Cereal- and Grass-Specific Lineages of the Rice Blast Fungus Magnaporthe oryzae. (2018) MBio 9, e01219-17.
Gladieux P, Condon B, Ravel S, Soanes D, Maciel JLN, Nhani A Jr, Chen L, Terauchi R, Lebrun MH, Tharreau D, Mitchell T, Pedley KF, Valent B, Talbot NJ, Farman M, Fournier E
Abstract: Delineating species and epidemic lineages in fungal plant pathogens is critical to our understanding of disease emergence and the structure of fungal biodiversity and also informs international regulatory decisions. Pyricularia oryzae (syn. Magnaporthe oryzae) is a multihost pathogen that infects multiple grasses and cereals, is responsible for the most damaging rice disease (rice blast), and is of growing concern due to the recent introduction of wheat blast to Bangladesh from South America. However, the genetic structure and evolutionary history of M. oryzae, including the possible existence of cryptic phylogenetic species, remain poorly defined. Here, we use whole-genome sequence information for 76 M. oryzae isolates sampled from 12 grass and cereal genera to infer the population structure of M. oryzae and to reassess the species status of wheat-infecting populations of the fungus. Species recognition based on genealogical concordance, using published data or extracting previously used loci from genome assemblies, failed to confirm a prior assignment of wheat blast isolates to a new species (Pyricularia graminis-tritici). Inference of population subdivisions revealed multiple divergent lineages within M. oryzae, each preferentially associated with one host genus, suggesting incipient speciation following host shift or host range expansion. Analyses of gene flow, taking into account the possibility of incomplete lineage sorting, revealed that genetic exchanges have contributed to the makeup of multiple lineages within M. oryzae These findings provide greater understanding of the ecoevolutionary factors that underlie the diversification of M. oryzae and highlight the practicality of genomic data for epidemiological surveillance in this important multihost pathogen.IMPORTANCE Infection of novel hosts is a major route for disease emergence by pathogenic microorganisms. Understanding the evolutionary history of multihost pathogens is therefore important to better predict the likely spread and emergence of new diseases. Magnaporthe oryzae is a multihost fungus that causes serious cereal diseases, including the devastating rice blast disease and wheat blast, a cause of growing concern due to its recent spread from South America to Asia. Using whole-genome analysis of 76 fungal strains from different hosts, we have documented the divergence of M. oryzae into numerous lineages, each infecting a limited number of host species. Our analyses provide evidence that interlineage gene flow has contributed to the genetic makeup of multiple M. oryzae lineages within the same species. Plant health surveillance is therefore warranted to safeguard against disease emergence in regions where multiple lineages of the fungus are in contact with one another.

Magnaporthe oryzae WBKY11

[ Opisthokonta | Fungi | Dikarya | . . .
. . . | Magnaporthales | Magnaporthaceae | Magnaporthe ]

Magnaporthe_oryzae_WBKY11 Picture Source
Taxonomy:Eukaryota | Opisthokonta | Fungi | Dikarya | Ascomycota | saccharomyceta | Pezizomycotina | leotiomyceta | sordariomyceta | Sordariomycetes | Sordariomycetidae | Magnaporthales | Magnaporthaceae | Magnaporthe
Anamorph:Pyricularia oryzae
Common:rice blast fungus
Ncbi Go to NCBI Taxonomy (318829)
Eol Encyclopedia of life
Wiki Wikipedia

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Magnaporthe oryzae WHTQ

[ Opisthokonta | Fungi | Dikarya | . . .
. . . | Magnaporthales | Magnaporthaceae | Magnaporthe ]

Magnaporthe_oryzae_WHTQ Picture Source
Taxonomy:Eukaryota | Opisthokonta | Fungi | Dikarya | Ascomycota | saccharomyceta | Pezizomycotina | leotiomyceta | sordariomyceta | Sordariomycetes | Sordariomycetidae | Magnaporthales | Magnaporthaceae | Magnaporthe
Anamorph:Pyricularia oryzae
Common:rice blast fungus
Ncbi Go to NCBI Taxonomy (318829)
Eol Encyclopedia of life
Wiki Wikipedia

Genome files Show genomes


Magnaporthe grisea VO107

[ Opisthokonta | Fungi | Dikarya | . . .
. . . | Magnaporthales | Magnaporthaceae | Magnaporthe ]

Magnaporthe_grisea_VO107 Picture Source
Taxonomy:Eukaryota | Opisthokonta | Fungi | Dikarya | Ascomycota | saccharomyceta | Pezizomycotina | leotiomyceta | sordariomyceta | Sordariomycetes | Sordariomycetidae | Magnaporthales | Magnaporthaceae | Magnaporthe
Synonym:Pyricularia grisea
Common:rice blast fungus, rice rotten neck, rice seedling blight, blast of rice, oval leaf spot of graminea, pitting disease, ryegrass blast, Johnson spot (German: Reisbrandpilz)
Ncbi Go to NCBI Taxonomy (148305)
Eol Encyclopedia of life
Wiki Wikipedia

Genome files Show genomes


diArk 3.0 Content Info

Species:6479
References:170
Projects:9048
gen DNA Projects:5213
EST/cDNA Projects:851
Publications:2409
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link to scipio
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MPI for biophysical chemistry

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