Hokkaido University Collection of Scholarly and Academic Papers >
Creative Research Institution >
Peer-reviewed Journal Articles, etc >
Comparison of the Z and W sex chromosomal architectures in elegant crested tinamou (Eudromia elegans) and ostrich (Struthio camelus) and the process of sex chromosome differentiation in palaeognathous birds.
Title: | Comparison of the Z and W sex chromosomal architectures in elegant crested tinamou (Eudromia elegans) and ostrich (Struthio camelus) and the process of sex chromosome differentiation in palaeognathous birds. |
Authors: | Tsuda, Yayoi Browse this author | Nishida-Umehara, Chizuko Browse this author →KAKEN DB | Ishijima, Junko Browse this author | Yamada, Kazuhiko Browse this author | Matsuda, Yoichi Browse this author |
Issue Date: | Apr-2007 |
Publisher: | Springer Berlin / Heidelberg |
Journal Title: | Chromosoma |
Volume: | 116 |
Issue: | 2 |
Start Page: | 159 |
End Page: | 173 |
Publisher DOI: | 10.1007/s00412-006-0088-y |
PMID: | 17219176 |
Abstract: | To clarify the process of avian sex chromosome differentiation in palaeognathous birds, we performed molecular and cytogenetic characterization of W chromosome-specific repetitive DNA sequences for elegant crested tinamou (Eudromia elegans, Tinamiformes) and constructed comparative cytogenetic maps of the Z and W chromosomes with nine chicken Z-linked gene homologues for E. elegans and ostrich (Struthio camelus, Struthioniformes). A novel family of W-specific repetitive sequences isolated from E. elegans was found to be composed of guanine- and cytosine-rich 293-bp elements that were tandemly arrayed in the genome as satellite DNA. No nucleotide sequence homologies were found for the Struthioniformes and neognathous birds. The comparative cytogenetic maps of the Z and W chromosomes of E. elegans and S. camelus revealed that there are partial deletions in the proximal regions of the W chromosomes in the two species, and the W chromosome is more differentiated in E. elegans than in S. camelus. These results suggest that a deletion firstly occurred in the proximal region close to the centromere of the acrocentric proto-W chromosome and advanced toward the distal region. In E. elegans, the W-specific repeated sequence elements were amplified site-specifically after deletion of a large part of the W chromosome occurred. |
Rights: | The original publication is available at www.springerlink.com |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/22538 |
Appears in Collections: | 創成研究機構 (Creative Research Institution) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 松田 洋一
|