Meiotic behavior of a supernumerary chromosome in Magnaporthe oryzae

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

Meiotic behavior of a supernumerary chromosome in Magnaporthe oryzae

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

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	191-198
Number of pages	8
Journal	Current Genetics
Volume	43
Issue number	3
Publication status	Published - Jun 1 2003

Keywords

Ectopic sister chromatid recombination
Minichromosome
Supernumerary chromosome

ASJC Scopus subject areas

Genetics

Cite this

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AU - Tosa, Y.

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AU - Mayama, S.

PY - 2003/6/1

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AB - 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.

KW - Ectopic sister chromatid recombination

KW - Minichromosome

KW - Supernumerary chromosome

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Meiotic behavior of a supernumerary chromosome in Magnaporthe oryzae

Abstract

Keywords

ASJC Scopus subject areas

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