Document Detail

Chromosome territory arrangement and homologous pairing in nuclei of Arabidopsis thaliana are predominantly random except for NOR-bearing chromosomes.
MedLine Citation:
PMID:  15480725     Owner:  NLM     Status:  MEDLINE    
Differential painting of all five chromosome pairs of Arabidopsis thaliana revealed for the first time the interphase chromosome arrangement in a euploid plant. Side-by-side arrangement of heterologous chromosome territories and homologous association of chromosomes 1, 3 and 5 (on average in 35-50% of nuclei) are in accordance with the random frequency predicted by computer simulations. Only the nucleolus organizing region (NOR)-bearing chromosome 2 and 4 homologs associate more often than randomly, since NORs mostly attach to a single nucleolus. Somatic pairing of homologous approximately 100 kb segments occurs less frequently than homolog association, not significantly more often than expected at random and not simultaneously along the homologs. Thus, chromosome arrangement in Arabidopsis differs from that in Drosophila (characterized by somatic pairing of homologs), in spite of similar genome size, sequence organization and chromosome number. Nevertheless, in up to 31.5% of investigated Arabidopsis nuclei allelic sequences may share positions close enough for homologous recombination.
Ales Pecinka; Veit Schubert; Armin Meister; Gregor Kreth; Marco Klatte; Martin A Lysak; Jörg Fuchs; Ingo Schubert
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2004-10-09
Journal Detail:
Title:  Chromosoma     Volume:  113     ISSN:  0009-5915     ISO Abbreviation:  Chromosoma     Publication Date:  2004 Nov 
Date Detail:
Created Date:  2004-10-25     Completed Date:  2005-05-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985138R     Medline TA:  Chromosoma     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  258-69     Citation Subset:  IM    
Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, 06466 Gatersleben, Germany.
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MeSH Terms
Arabidopsis / genetics*
Cell Nucleolus / physiology
Cell Nucleus / ultrastructure
Chromosome Pairing*
Chromosomes, Plant / genetics*
Computer Simulation
DNA, Plant / genetics
Drosophila / genetics
Gene Rearrangement*
Nucleolus Organizer Region / physiology*
Recombination, Genetic*
Reg. No./Substance:
0/DNA, Plant

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