PMID- 15284880 OWN - NLM STAT- MEDLINE DCOM- 20050207 LR - 20161020 IS - 0831-2796 (Print) IS - 0831-2796 (Linking) VI - 47 IP - 4 DP - 2004 Aug TI - A direct repeat sequence associated with the centromeric retrotransposons in wheat. PG - 747-56 AB - A high-density BAC filter of Triticum monococcum was screened for the presence of a centromeric retrotransposon using the integrase region as a probe. Southern hybridization to the BAC digests using total genomic DNA probes of Triticum monococcum, Triticum aestivum, and Hordeum vulgare detected differentially hybridizing restriction fragments between wheat and barley. The fragments that hybridized to genomic DNA of wheat but not to that of barley were subcloned. Fluorescence in situ hybridization (FISH) analysis indicated that the clone pHind258 hybridized strongly to centromeric regions in wheat and rye and weakly to those in barley. The sequence of pHind258 was homologous to integrase and long terminal repeats of centromeric Ty3-gypsy retrotransposons of cereal species. Additionally, pHind258 has a pair of 192-bp direct repeats. FISH analysis indicated that the 192-bp repeat probe hybridized to centromeres of wheat and rye but not to those of barley. We found differential FISH signal intensities among wheat chromosomes using the 192-bp probe. In general, the A-genome chromosomes possess strong FISH signals, the B-genome chromosomes possess moderate signals, and the D-genome chromosomes possess weak signals. This was consistent with the estimated copy numbers of the 192-bp repeats in the ancestral species of hexaploid wheat. FAU - Ito, Hidetaka AU - Ito H AD - Laboratory of Plant Genetics, Graduate School of Agriculture, Kyoto University, Kitashirakawaoiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan. FAU - Nasuda, Shuhei AU - Nasuda S FAU - Endo, Takashi R AU - Endo TR LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Canada TA - Genome JT - Genome JID - 8704544 RN - 0 (DNA, Plant) RN - 0 (Retroelements) SB - IM EIN - Genome. 2004 Oct;47(5):998 MH - Base Sequence MH - Centromere/genetics MH - Chromosomes, Artificial, Bacterial/genetics MH - Cloning, Molecular MH - DNA, Plant/*genetics MH - Genome, Plant MH - In Situ Hybridization, Fluorescence MH - Molecular Sequence Data MH - Phylogeny MH - Poaceae/genetics MH - *Repetitive Sequences, Nucleic Acid MH - Retroelements/*genetics MH - Sequence Homology, Nucleic Acid MH - Triticum/*genetics EDAT- 2004/07/31 05:00 MHDA- 2005/02/08 09:00 CRDT- 2004/07/31 05:00 PHST- 2004/07/31 05:00 [pubmed] PHST- 2005/02/08 09:00 [medline] PHST- 2004/07/31 05:00 [entrez] AID - g04-034 [pii] AID - 10.1139/g04-034 [doi] PST - ppublish SO - Genome. 2004 Aug;47(4):747-56. doi: 10.1139/g04-034.