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.

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. Research Abstract Details 

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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. Abstract Text:

Yayoi Tsuda,Chizuko Nishida-Umehara,Junko Ishijima,Kazuhiko Yamada,Yoichi Matsuda,Yayoi Tsuda,Chizuko Nishida-Umehara,Junko Ishijima,Kazuhiko Yamada,Yoichi Matsuda,

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.

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. Publishing Authors By Initials

Y Tsuda,C Nishida-Umehara,J Ishijima,K Yamada,Y Matsuda,Y Tsuda,C Nishida-Umehara,J Ishijima,K Yamada,Y Matsuda,

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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. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Chromosoma

VOLUME: 116

Page Numbers: 159-73

Journal Abbreviation: Chromosoma

ISSN: 0009-5915

DAY: 12

MONTH: 01

YEAR: 2007

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. Information

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LANGUAGE: eng

NlmUniqueID: 2985138

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. Keywords Mesh Terms:

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Grant and Affiliation Information for 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.

AFFILIATION: Laboratory of Cytogenetics, Division of Bioscience, Graduate School of Environmental Earth Science, Hokkaido University, North 10 West 8, Sapporo 060-0810, Japan.

Country: Germany

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MEDLINETA: Chromosoma

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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 Related Publications

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