J Hered. 2002 Jul-Aug;93(4):279-82.

rDNA (18S-28S and 5S) colocalization and linkage between ribosomal genes and (TTAGGG)(n) telomeric sequence in the earthworm, Octodrilus complanatus (Annelida: Oligochaeta: Lumbricidae), revealed by single- and double-color FISH.

Vitturi R, Colomba MS, Pirrone AM, Mandrioli M.

Source

Dipartimento di Biologia Animale, Università di Palermo, Palermo, Italy. zuvitcol@unipa.it

Abstract

Spermatogonial and metaphase I chromosomes of the lumbricid earthworm Octodrilus complanatus (Annelida: Oligochaeta) were examined using fluorescent in situ hybridization (FISH) with three repetitive DNA probes-5S rDNA, 18S-26S rDNA, and (TTAGGG)(n). Single-color FISH consistently mapped one chromosome pair per spread using either 5S rDNA or 18S-26S rDNA as probes. Simultaneous (18S-26S)-5S and (18S-26S)-(TTAGGG)(n) FISH demonstrated that repeated units of the two ribosomal families were overlapped and closely associated with telomeric sequences.

PMID:: 12407215; [PubMed - indexed for MEDLINE]

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Research Support, Non-U.S. Gov't

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DNA, Ribosomal

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rDNA (18S-28S and 5S) colocalization and linkage between ribosomal genes and (TT...
rDNA (18S-28S and 5S) colocalization and linkage between ribosomal genes and (TTAGGG)(n) telomeric sequence in the earthworm, Octodrilus complanatus (Annelida: Oligochaeta: Lumbricidae), revealed by single- and double-color FISH.
J Hered. 2002 Jul-Aug ;93(4):279-82.

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