Specific boundaries between the causal agents of the soybean stem canker
AUTOR(ES)
Guillin, Eduardo A., Grijalba, Pablo E., Oliveira, Luiz Orlando de, Gottlieb, Alexandra M.
FONTE
Trop. plant pathol.
DATA DE PUBLICAÇÃO
2014-08
RESUMO
Pathogens within the Diaporthe complex cause seed decay, stem blight and stem canker on soybean, representing a serious threat for this crop species. We herein utilize worldwide sequence data retrieved from Genbank in order to assess the species boundaries between the soybean stem canker causal agents, and define whether or not they should be regarded as members of the same biological species. These studies were complemented with compatibility tests, in order to validate our findings from a biological standpoint. Species delimitation assays supported the occurrence of a speciation event between D. caulivora and D. phaseolourm var. meridionalis. A speciation hypothesis between D. aspalathi and D. phaseolourm var. meridionalis was also supported, based on three reciprocally monophyletic substitutions at locus EF1-α. Compatibility tests further validated species delimitation assays indicating that D. caulivora has developed barriers to gene exchange with D. phaseolorum var. meridionalis. Clarification of the specific boundaries of the SSC pathogens and related entities will be an important asset to future research in soybean pathology, epidemiology and breeding.
Documentos Relacionados
- Survival of Diaporthe phaseolorum var. caulivora (causal agent of soybean stem canker) artificially inoculated in different crop residues
- First report and characterization of Fusarium circinatum, the causal agent of pitch canker in Brazil
- Molecular characterization of beta-tubulin from Phakopsora pachyrhizi, the causal agent of Asian soybean rust
- Characterization of the boundaries between adjacent rapidly and slowly evolving genomic regions in Drosophila.
- Effect of soybean plant density on stem blight incidence