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 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.
Lam
Sandy Y
SY
Department of Biology, University of North Carolina, Chapel Hill, 27599, USA.
Horn
Sarah R
SR
Radford
Sarah J
SJ
Housworth
Elizabeth A
EA
Stahl
Franklin W
FW
Copenhaver
Gregory P
GP
D017360:Arabidopsis / Q000235:genetics*; D002466:Cell Nucleolus / Q000648:ultrastructure*; D002467:Cell Nucleus / Q000648:ultrastructure*; D002874:Chromosome Mapping; D023902:Chromosome Pairing; D002875:Chromosomes / Q000648:ultrastructure*; D003434:Crossing Over, Genetic; D004247:DNA / Q000378:metabolism; D017343:Genes, Plant; D005819:Genetic Markers; D016013:Likelihood Functions; D046911:Macromolecular Substances; D008957:Models, Genetic; D008962:Models, Theoretical; D017434:Protein Structure, Tertiary; D011995:Recombination, Genetic
D005819:Genetic Markers; D046911:Macromolecular Substances; D004247:DNA