Barley chromosome arms longer than half of the spindle axis interfere with nuclear divisions.

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.

journal_name

Cytogenet Genome Res

authors

Hudakova S,Künzel G,Endo TR,Schubert I

doi

10.1159/000068530

keywords:

subject

Has Abstract

pub_date

2002-01-01 00:00:00

pages

101-7

issue

1

eissn

1424-8581

issn

1424-859X

pii

68530

journal_volume

98

pub_type

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