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Vol. 114, No. 2, 2006
Issue release date: July 2006
Section title: Original Article
Cytogenet Genome Res 114:169–174 (2006)
(DOI:10.1159/000093334)

Elimination of chromosomes in Hordeum vulgare × H. bulbosum crosses at mitosis and interphase involves micronucleus formation and progressive heterochromatinization

Gernand D.a · Rutten T.a · Pickering R.b · Houben A.a
aInstitute of Plant Genetics and Crop Plant Research (IPK), Gatersleben (Germany);aNew Zealand Institute for Crop & Food Research Limited, Christchurch (New Zealand)

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Article / Publication Details

First-Page Preview
Abstract of Original Article

Published online: 7/7/2006
Issue release date: July 2006

Number of Print Pages: 6
Number of Figures: 4
Number of Tables: 0

ISSN: 1424-8581 (Print)
eISSN: 1424-859X (Online)

For additional information: http://www.karger.com/CGR

Abstract

Uniparental chromosome elimination occurs in several interspecific hybrids of plants. We studied the mechanism underlying selective elimination of the paternal chromosomes during the development of Hordeum vulgare × H. bulbosum hybrid embryos that is restricted to an early stage of development. In almost all embryos most of the H. bulbosum chromatin undergoes a fast rate of elimination within nine days after pollination. There are differences in the mitotic behaviour between the parental chromosomes, with H. bulbosum chromatids segregating asymmetrically at anaphase. We provide evidence for a chromosome elimination pathway that involves the formation of nuclear extrusions during interphase in addition to postmitotically formed micronuclei. The chromatin structure of nuclei and micronuclei differs and heterochromatinization and disintegration of the nuclear envelope of micronuclei are the final steps of chromosome elimination.

© 2006 S. Karger AG, Basel


  

Author Contacts

Request reprints from Andreas Houben
Institute of Plant Genetics and Crop Plant Research (IPK)
Corrensstr. 3, 06466 Gatersleben (Germany)
telephone +49 39482 5486; fax +49 39482 5137
e-mail: houben@ipk-gatersleben.de

  

Article Information

This work was supported by the Bundesministerium für Bildung und Forschung (Berlin, Germany) and the Icon Genetics GmbH (Halle, Germany).

Manuscript received: 29 August 2005
Accepted in revised form for publication by M. Schmid,: 23 November 2005.
Number of Print Pages : 6
Number of Figures : 4, Number of Tables : 0, Number of References : 24

  

Publication Details

Cytogenetic and Genome Research

Vol. 114, No. 2, Year 2006 (Cover Date: July 2006)

Journal Editor: Schmid, M. (Würzburg)
ISSN: 1424–8581 (print), 1424–859X (Online)

For additional information: http://www.karger.com/CGR


Article / Publication Details

First-Page Preview
Abstract of Original Article

Published online: 7/7/2006
Issue release date: July 2006

Number of Print Pages: 6
Number of Figures: 4
Number of Tables: 0

ISSN: 1424-8581 (Print)
eISSN: 1424-859X (Online)

For additional information: http://www.karger.com/CGR


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