Meiotic behavior of a supernumerary chromosome in Magnaporthe oryzae

I. Chuma, Y. Tosa, M. Taga, H. Nakayashiki, S. Mayama

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A 1.2-Mb DNA band from an isolate of Magnaporthe oryzae was detected in a pulsed-field gel. A chromosomal entity corresponding to this band was observed at the mitotic metaphase stage. This minichromosome, carrying many transposable elements and two telomeres, was transmitted to ascosporic F1. cultures in a non-Mendelian manner with frequent changes in its size and number. Segregation analysis with RFLP markers indicated that the minichromosome underwent structural rearrangements, such as deletion 'and duplication, not only during meiosis but also after meiosis. An ectopic sister chromatid recombination may cause the size variation of the minichromosomes.

Original languageEnglish
Pages (from-to)191-198
Number of pages8
JournalCurrent Genetics
Volume43
Issue number3
Publication statusPublished - Jun 1 2003

Keywords

  • Ectopic sister chromatid recombination
  • Minichromosome
  • Supernumerary chromosome

ASJC Scopus subject areas

  • Genetics

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    Chuma, I., Tosa, Y., Taga, M., Nakayashiki, H., & Mayama, S. (2003). Meiotic behavior of a supernumerary chromosome in Magnaporthe oryzae. Current Genetics, 43(3), 191-198.