Phylogeny and pathogenicity of Fusarium solani species complex (FSSC) associated with potato tubers

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Abstract Potato (Solanum tuberosum L.) is among the top five crops growing worldwide following cereals, rice, wheat, barley and corn due to its high carbohydrate content and adaptability. Potatoes are particularly valued in developing countries as a rich source of vitamins C and B6, starch and essential amino acids. Fusarium solani species complex (FSSC) is a common pathogen of potato, causing dry rot in the Upper Egypt. In this study were isolated and identified FSSC from potato tubers based on the morphological followed by molecular characteristics. 187 isolates of Fusarium solani were achieved from infected and non-infected potato tubers gathered from different markets in the Upper Egypt. Dependent upon the morphological characteristics, sequence data from amplifying β-tubulin and specific translation elongation factor (TEF-1α) genes, all of the selected FSSC isolates were divided into three major groups (F. keratoplasticum, F. falciforme and F. solani). All the tested FSSC were capable of producing amylases. All of the isolates were examined for their pathogenic ability on healthy potato tubers, which showed pathogenic effects; with lesion sizes were quite variable. F. solani SVUFs73 showed a highly virulent effect.

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