Crossover Interference on Nucleolus Organizing Region-Bearing Chromosomes in Arabidopsis

In most eukaryotes, crossovers are not independently distributed along the length of a chromosome. Instead, they appear to avoid close proximity to one another--a phenomenon known as crossover interference. Previously, for three of the five Arabidopsis chromosomes, we measured the strength of interf...

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Bibliographic Details
Published in:Genetics (Austin) 2005-06, Vol.170 (2), p.807-812
Main Authors: Lam, Sandy Y, Horn, Sarah R, Radford, Sarah J, Housworth, Elizabeth A, Stahl, Franklin W, Copenhaver, Gregory P
Format: Article
Language:English
Subjects:
Arabidopsis
Arabidopsis - genetics
Cell Nucleolus - ultrastructure
Cell Nucleus - ultrastructure
Chromosome Mapping
Chromosome Pairing
Chromosomes
Chromosomes - ultrastructure
Confidence intervals
Crossing Over, Genetic
Data analysis
DNA - metabolism
Genes, Plant
Genetic Markers
Genetic recombination
Investigations
Likelihood Functions
Macromolecular Substances
Models, Genetic
Models, Theoretical
Protein Structure, Tertiary
Recombination, Genetic
Studies
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Summary:In most eukaryotes, crossovers are not independently distributed along the length of a chromosome. Instead, they appear to avoid close proximity to one another--a phenomenon known as crossover interference. Previously, for three of the five Arabidopsis chromosomes, we measured the strength of interference and suggested a model wherein some crossovers experience interference while others do not. Here we show, using the same model, that the fraction of interference-insensitive crossovers is significantly smaller on the remaining two chromosomes. Since these two chromosomes bear the Arabidopsis NOR domains, the possibility that these chromosomal regions influence interference is discussed.
ISSN:0016-6731
1943-2631
1943-2631
DOI:10.1534/genetics.104.040055