Phylogeny of the pecan scab fungus <Emphasis Type="Italic">Fusicladium effusum</Emphasis> G. Winter based on the cytochrome b gene sequence |
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Authors: | Murat Seyran Claudia Nischwitz Kippy J Lewis Ronald D Gitaitis Timothy B Brenneman Katherine L Stevenson |
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Institution: | (1) Department of Pharmaceutical Sciences, University of Ferrara, Via Fossato di Mortara, 17/19, 44100 Ferrara, Italy;(2) Department of Plant Sciences Division of Plant Pathology and Microbiology, University of Arizona, Forbes 303, Tucson, AZ 85721-0036, USA;(3) Department of Plant Pathology, University of Georgia, Coastal Plain Experiment Station, Tifton, GA 31793, USA; |
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Abstract: | Pecan scab, caused by the fungus Fusicladium effusum, is the most devastating disease of pecan (Carya illinoinensis) trees and is responsible for the majority of disease management efforts applied to that crop. The taxonomy of the fungus
changed several times in the last decade and most recently, using ITS nrDNA data and conventional taxonomic methods, the organism
was renamed F. effusum. In our study, a conserved region of the mitochondrial cytochrome b gene was sequenced from three isolates of F. effusum. The obtained sequences showed 95% nucleic acid and 100% amino acid homology (201–266 amino acids on exon 5 of the cytochrome
b gene) with Venturia inaequalis (NCBI GenBank accession number AF047029). And in the maximum parsimony tree based on nucleotide sequences, F. effusum and V. inaequalis were clustered, with a 92% bootstrap value. The taxonomic classification of the pecan scab fungus was supported based on
the cytochrome b region. |
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