Barley chromosome arms longer than half of the spindle axis interfere with nuclear divisions.
Cytogenet Genome Res
; 98(1): 101-7, 2002.
Article
em En
| MEDLINE
| ID: mdl-12584450
ABSTRACT
We have tested the influence of recombinantly-elongated chromosome arms on nuclear divisions in barley and confirmed a rule according to which half the length of the average spindle axis defines the upper tolerance limit for chromosome arm length. A slightly longer chromosome arm caused incomplete separation of sister chromatids in approximately 70% of mitotic telophase cells and >2.5% of daughter cells showing a micronucleus, due to disruption of non-separated sister chromatids by the newly forming cell wall. In homozygous condition, this elongated chromosome mediated a slower growth and reduced fertility of the carrier plants. Its meiotic transmission was not impaired because of the larger spindle dimensions in meiocytes as compared to those in mitotic cells.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Hordeum
/
Núcleo Celular
/
Cromossomos de Plantas
Idioma:
En
Revista:
Cytogenet Genome Res
Ano de publicação:
2002
Tipo de documento:
Article