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The molecular basis of chromosome orthologies and sex chromosomal differentiation in palaeognathous birds
| Title: | The molecular basis of chromosome orthologies and sex chromosomal differentiation in palaeognathous birds |
| Authors: | Nishida-Umehara, Chizuko Browse this author →KAKEN DB | | Tsuda, Yayoi Browse this author | | Ishijima, Junko Browse this author | | Ando, Junko Browse this author | | Fujiwara, Atushi Browse this author | | Matsuda, Yoichi Browse this author | | Griffin, Darren K. Browse this author |
| Keywords: | chromosome painting | | gene mapping | | sex chromosome | | Struthioniformes | | Tinamiformes |
| Issue Date: | Oct-2007 |
| Publisher: | Springer Netherlands |
| Journal Title: | Chromosome Research |
| Volume: | 15 |
| Issue: | 6 |
| Start Page: | 721 |
| End Page: | 734 |
| Publisher DOI: | 10.1007/s10577-007-1157-7 |
| PMID: | 17605112 |
| Abstract: | Palaeognathous birds (Struthioniformes and Tinamiformes) have morphologically conserved karyotypes and less differentiated ZW sex chromosomes. To delineate interspecific chromosome orthologies in palaeognathous birds we conducted comparative chromosome painting with chicken (Gallus gallus, GGA) chromosome 1–9 and Z chromosome paints (GGA1–9 and GGAZ) for emu, double-wattled cassowary, ostrich, greater rhea, lesser rhea and elegant crested tinamou. All six species showed the same painting patterns: each probe was hybridized to a single pair of chromosomes with the exception that the GGA4 was hybridized to the fourth largest chromosome and a single pair of microchromosomes. The GGAZ was also hybridized to the entire region of the W chromosome, indicating that extensive homology remains between the Z and W chromosomes on the molecular level. Comparative FISH mapping of four Z- and/or W-linked markers, the ACO1/IREBP, ZOV3 and CHD1 genes and the EE0.6 sequence, revealed the presence of a small deletion in the proximal region of the long arm of the W chromosome in greater rhea and lesser rhea. These results suggest that the karyotypes and sex chromosomes of palaeognathous birds are highly conserved not only morphologically, but also at the molecular level; moreover, palaeognathous birds appear to retain the ancestral lineage of avian karyotypes. |
| Rights: | The original publication is available at www.springerlink.com |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/30225 |
| Appears in Collections: | 創成研究機構 (Creative Research Institution) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 西田 千鶴子
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