Phylogeography of the Solanaceae-infecting Basidiomycota fungus <Emphasis Type="Italic">Rhizoctonia solani</Emphasis> AG-3 based on sequence analysis of two nuclear DNA loci |
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| Authors: | Paulo C Ceresini H David Shew Timothy Y James Rytas J Vilgalys Marc A Cubeta |
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| Institution: | 1.ETH Zurich – Swiss Federal Institute of Technology, IBZ,Zurich,Switzerland;2.Department of Plant Pathology,North Carolina State University,Raleigh,USA;3.Department of Biology,Duke University,Durham,USA;4.Departamento de Fitossanidade, Engenharia Rural e Solos,Universidade Estadual Paulista – UNESP,Ilha Solteira, S?o Paulo,Brazil |
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| Abstract: | Background The soil fungus Rhizoctonia solani anastomosis group 3 (AG-3) is an important pathogen of cultivated plants in the family Solanaceae. Isolates of R. solani AG-3 are taxonomically related based on the composition of cellular fatty acids, phylogenetic analysis of nuclear ribosomal
DNA (rDNA) and beta-tubulin gene sequences, and somatic hyphal interactions. Despite the close genetic relationship among
isolates of R. solani AG-3, field populations from potato and tobacco exhibit comparative differences in their disease biology, dispersal ecology,
host specialization, genetic diversity and population structure. However, little information is available on how field populations
of R. solani AG-3 on potato and tobacco are shaped by population genetic processes. In this study, two field populations of R. solani AG-3 from potato in North Carolina (NC) and the Northern USA; and two field populations from tobacco in NC and Southern Brazil
were examined using sequence analysis of two cloned regions of nuclear DNA (pP42F and pP89). |
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