Diversity of the Hyaloperonospora parasitica complex from core brassicaceous hosts based on ITS rDNA sequences

Young Joon Choi, Seung Beom Hong, Hyeon-Dong Shin

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Sequence analysis of the ITS region of rDNA was used to investigate the level of genetic diversity occurring within Hyaloperonospora parasitica, and to show the relationship between phylogenies of these fungi and their hosts (Brassicaceae). Maximum parsimony and neighbour-joining analyses were performed using sequences from 32 isolates of Hyaloperonospora and Perofascia, which infect core brassicaceous hosts. For comparison, five isolates of Peronospora were also studied. The constructed phylogenetic trees showed trichotomy, showing that Hyaloperonospora, Perofascia, and Peronospora have different evolutionary histories. Although isolates from Peronospora and Perofascia clearly formed respective clades, the Hyaloperonospora group allowed separation of the isolates into four distinct clades, which shared significantly low sequence similarities. We suggest that H. parasitica infecting brassicaceous hosts should be divided into a number of distinct species. The comparison of the phylogeny of H. parasitica and that of the Brassicaceae suggests that this fungus is closely related with tribes Arabidae and Brassiceae within this host family, illustrating the potential of downy mildews for co-evolution with their hosts.

Original languageEnglish
Pages (from-to)1314-1322
Number of pages9
JournalMycological Research
Volume107
Issue number11
DOIs
Publication statusPublished - 2003 Nov 1

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Peronospora
Peronospora parasitica
Ribosomal DNA
Brassicaceae
Phylogeny
Fungi
phylogeny
fungus
mildews
fungi
Sequence Analysis
coevolution
sequence analysis
phylogenetics
genetic variation
history

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Plant Science

Cite this

Diversity of the Hyaloperonospora parasitica complex from core brassicaceous hosts based on ITS rDNA sequences. / Choi, Young Joon; Hong, Seung Beom; Shin, Hyeon-Dong.

In: Mycological Research, Vol. 107, No. 11, 01.11.2003, p. 1314-1322.

Research output: Contribution to journalArticle

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