title: Crossover interference on nucleolus organizing region-bearing chromosomes in Arabidopsis.
abstract: 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.
authors.affiliation: Department of Biology, University of North Carolina, Chapel Hill, 27599, USA.
authors.forename: Sandy Y
authors.initials: SY
authors.lastname: Lam
authors.forename: Sarah R
authors.initials: SR
authors.lastname: Horn
authors.forename: Sarah J
authors.initials: SJ
authors.lastname: Radford
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Housworth
authors.forename: Franklin W
authors.initials: FW
authors.lastname: Stahl
authors.forename: Gregory P
authors.initials: GP
authors.lastname: Copenhaver
mesh_terms: 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
chemical_list: D005819:Genetic Markers; D046911:Macromolecular Substances; D004247:DNA