Genetic duplication in Fusarium oxysporum
Related Experiment Video
Updated: Nov 6, 2026

A Contrast of Three Inoculation Techniques used to Determine the Race of Unknown Fusarium oxysporum f.sp. niveum Isolates
Published on: October 28, 2021
H C Kistler1, U Benny, E W Boehm
1Plant Pathology Department, University of Florida, Gainesville 32611-0680, USA.
Abstract:
Genomic clones hybridizing to anonymous, single-copy sequences were used to probe chromosome-sized DNAs of Fusarium oxysporum f. sp. cubense separated by pulsed-field gel electrophoresis. As expected, most clones hybridized to single chromosome bands. However, two of eight "single-copy" clones hybridized to two chromosomes in some, but not all, of 14 isolates examined. This observation suggests a degree of genetic duplication in the fungus and is consistent with recent electrophoretic karyotype analysis indicating that intraspecific differences in genome size and chromosome number may be explained, at least in part, by persistent genetic duplication.
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