Variation and Phylogeny of Fusarium oxysporum Isolates Based on Nucleotide Sequences of Polygalacturonase Genes

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概要

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• The nucleotide sequences of two endopolygalacturonase genes (pg1 and pg5) and two exopolygalacturonase genes (pgx1 and pgx4), which encode members of a major family of secreted cell-wall-degrading enzymes (CWDEs), were compared to detect the extent of genetic variation among isolates of Fusarium oxysporum. The nucleotide variation rate in exons was 0.23-0.93%, higher than that in introns (0.01-0.64%) and untranslated regions (UTRs) (0.07-0.25%), resulting in 0.05-0.31% variation in amino acids. pgx1 exhibited the most genetic diversity. Phylogenetic analysis of the four genes, which reside on different chromosomes, revealed different evolutionary patterns for each. Our results suggest a biased evolution of the polygalacturonase genes of F. oxysporum, or alternatively, that the genes were acquired at different times during evolution.

• 日本微生物生態学会の論文

著者

• Arie Tsutomu

  Tokyo University Of Agriculture And Technology (tuat)

• Hirano Yasushi

  Saitama Prefectural Agriculture And Forestry Research Center

• Arie Tsutomu

  Tokyo Univ. Agriculture And Technol.(tuat) Tokyo Jpn

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