Electrophoretic and cytological karyotyping of the foliar wheat pathogen Mycosphaerella graminicola reveals many chromosomes with a large size range

Rahim Mehrabi, Masatoki Taga, Gert H J Kema

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The karyotypes of three isolates of Mycosphaerella graminicola, the septoria tritici blotch pathogen of wheat, were analyzed with both pulsed field gel electrophoresis (PFGE) and the cytological technique called germ tube burst method (GTBM). These analyses revealed a chromosome length polymorphism among these isolates. The estimated genome size was 31-40 Mb depending on the isolates, indicating 17-22% redundancy in the genome of the standard strain IPO323 because such differences do not affect development, pathogenicity and sexual reproduction of the other isolates. The chromosome numbers in the three isolates were 18-20 and the chromosome size was 0.3-6 Mb. These data show that M. graminicola has the highest chromosome number and the smallest autosomes (A chromosomes) in filamentous ascomycetes. Our data also confirmed a large (≥6 Mb) chromosome that was assembled recently in the IPO323 genome sequence. GTBM analyses revealed the mitotic metaphase chromosomes, enabling chromosome quantification, which was fully congruent with the PFGE analyses. These data will be instrumental in the final assembly of the M. graminicola genome.

Original languageEnglish
Pages (from-to)868-876
Number of pages9
JournalMycologia
Volume99
Issue number6
DOIs
Publication statusPublished - Nov 2007
Externally publishedYes

Fingerprint

Mycosphaerella graminicola
Karyotyping
karyotyping
range size
Triticum
chromosome
pathogen
Chromosomes
wheat
chromosomes
pathogens
genome
germ tube
Pulsed Field Gel Electrophoresis
Genome
pulsed-field gel electrophoresis
chromosome number
Cytological Techniques
Chromosomes, Human, Pair 20
Chromosomes, Human, Pair 18

Keywords

  • CHEF
  • Contour clamped homogenous field
  • Cytology
  • Electrophoresis
  • Genome size
  • Protoplast preparation
  • Septoria tritici blotch

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Plant Science

Cite this

Electrophoretic and cytological karyotyping of the foliar wheat pathogen Mycosphaerella graminicola reveals many chromosomes with a large size range. / Mehrabi, Rahim; Taga, Masatoki; Kema, Gert H J.

In: Mycologia, Vol. 99, No. 6, 11.2007, p. 868-876.

Research output: Contribution to journalArticle

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