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Highly conserved linkage homology between birds and turtles: Bird and turtle chromosomes are precise counterparts of each other

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Title: Highly conserved linkage homology between birds and turtles: Bird and turtle chromosomes are precise counterparts of each other
Authors: Matsuda, Yoichi Browse this author
Nishida-Umehara, Chizuko Browse this author →KAKEN DB
Tarui, Hiroshi Browse this author
Kuroiwa, Asato Browse this author
Yamada, Kazuhiko Browse this author
Isobe, Taku Browse this author
Ando, Junko Browse this author
Fujiwara, Atushi Browse this author
Hirao, Yukako Browse this author
Nishimura, Osamu Browse this author
Ishijima, Junko Browse this author
Hayashi, Akiko Browse this author
Saito, Toshiyuki Browse this author
Murakami, Takahiro Browse this author
Murakami, Yasunori Browse this author
Kuratani, Shigeru Browse this author
Agata, Kiyokazu Browse this author
Keywords: comparative mapping
sex chromosome
Issue Date: Aug-2005
Publisher: Springer Netherlands
Journal Title: Chromosome Research
Volume: 13
Issue: 6
Start Page: 601
End Page: 615
Publisher DOI: 10.1007/s10577-005-0986-5
PMID: 16170625
Abstract: The karyotypes of birds, turtles and snakes are characterized by two distinct chromosomal components, macrochromosomes and microchromosomes. This close karyological relationship between birds and reptiles has long been a topic of speculation among cytogeneticists and evolutionary biologists; however, there is scarcely any evidence for orthology at the molecular level. To define the conserved chromosome synteny among humans, chickens and reptiles and the process of genome evolution in the amniotes, we constructed comparative cytogenetic maps of the Chinese soft-shelled turtle (Pelodiscus sinensis) and the Japanese four-striped rat snake (Elaphe quadrivirgata) using cDNA clones of reptile functional genes. Homology between the turtle and chicken chromosomes is highly conserved, with the six largest chromosomes being almost equivalent to each other. On the other hand, homology to chicken chromosomes is lower in the snake than in the turtle. Turtle chromosome 6q and snake chromosome 2p represent conserved synteny with the chicken Z chromosome. These results suggest that the avian and turtle genomes have been well conserved during the evolution of the Arcosauria. The avian and snake sex Z chromosomes were derived from different autosomes in a common ancestor, indicating that the causative genes of sex determination may be different between birds and snakes.
Rights: The original publication is available at
Type: article (author version)
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

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