Local adaptation drives the diversification of effectors in the fungal wheat pathogen Parastagonospora nodorum in the United States.

ABSTRACT: Filamentous fungi rapidly evolve in response to environmental selection pressures in part due to their genomic plasticity. Parastagonospora nodorum, a fungal pathogen of wheat and causal agent of septoria nodorum blotch, responds to selection pressure exerted by its host, influencing the gain, loss, or functional diversification of virulence determinants, known as effector genes. Whole genome resequencing of 197 P. nodorum isolates collected from spring, durum, and winter wheat production regions of the United States enabled the examination of effector diversity and genomic regions under selection specific to geographically discrete populations. 1,026,859 SNPs/InDels were used to identify novel loci, as well as SnToxA and SnTox3 as factors in disease. Genes displaying presence/absence vari

SUBMITTER: Richards JK 

PROVIDER: S-EPMC6821140 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature