| Autor: |
Pecinka, Ales, Schubert, Veit, Meister, Armin, Kreth, Gregor, Klatte, Marco, Lysak, Martin A., Fuchs, Jorrg, Schubert, Ingo |
| Předmět: |
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| Zdroj: |
Chromosoma; Nov2004, Vol. 113 Issue 5, p258-269, 12p |
| Abstrakt: |
Differential painting of all five chromosome pairs ofArabidopsis thalianarevealed 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 ~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 inArabidopsisdiffers from that inDrosophila(characterized by somatic pairing of homologs), in spite of similar genome size, sequence organization and chromosome number. Nevertheless, in up to 31.5% of investigatedArabidopsisnuclei allelic sequences may share positions close enough for homologous recombination. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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