Meiotic behavior of a supernumerary chromosome in Magnaporthe oryzae

被引：24

作者：

Chuma, I

Tosa, Y ^{[1
]}

Taga, M

Nakayashiki, H

Mayama, S

机构：

[1] Kobe Univ, Fac Agr, Kobe, Hyogo 6578501, Japan

[2] Okayama Univ, Fac Sci, Dept Biol, Okayama 7008530, Japan

来源：

CURRENT GENETICS | 2003年 / 43卷 / 03期

关键词：

supernumerary chromosome; minichromosome; ectopic sister chromatid; recombination;

D O I：

10.1007/s00294-003-0390-7

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

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 F, 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.

引用

页码：191 / 198

页数：8

共 38 条

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