Highly conserved linkage homology between birds and turtles: Bird and turtle chromosomes are precise counterparts of each other
スポンサーリンク
概要
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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.
著者
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HIRAO Yukako
Genome Resource and Analysis Subunit, RIKEN Center for Developmental Biology
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NISHIMURA Osamu
Genome Resource and Analysis Subunit, RIKEN Center for Developmental Biology
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Agata K
Dep. Of Biophysics Graduate School Of Sci. Kyoto Univ.
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Agata Kiyokazu
Lab. Mol. Dev. Biol. Grad. Sch. Sci. Kyoto Univ.
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Agata Kiyokazu
理化学研究所発生再生科学総合研究センター
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Agata Kiyokazu
Genome Resource And Analysis Subunit Riken Center For Developmental Biology
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Yamada K
Lab. Anim. Cytogenet Creative Res. Initiative "sousei" Hokkaido Univ.
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Hirao Yukako
Genome Resource And Analysis Subunit Riken Center For Developmental Biology
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Tarui Hiroshi
Genome Resource And Analysis Subunit Riken Center For Developmental Biology
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Tarui Hiroshi
Evolutionary Regeneration Group Center For Developmental Biology Riken
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Agata Kiyokazu
Dep. Of Biophysics Graduate School Of Sci. Kyoto Univ.
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Agata Kiyokazu
Laboratory For Evolutionary Regeneration Center For Developmental Biology Riken
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Agata Kiyokazu
Riken Cdb Evo.
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Kuroiwa Asato
Grad. Sch. Sci. Hokkaido Univ.:cris Hokkaido Univ.
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Kuroiwa Asato
Grad. Sch. Life Sci. Biosys. Sci. Hokkaido Univ.:cris Hokkaido Univ.
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Kuroiwa Asato
Cent. Adv. Sci. Tech. Hokkaido Univ.:grad. Sch. Environ. Earth Sci. Hokkaido Univ.:fac. Sci. Hokkaid
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Kuroiwa Asato
Cris Hokkaido Univ Hokkaido Univ.
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Kuroiwa Asato
Laboratory Of Animal Cytogenetics Creative Ressearch Initiative "sousei" Hokkaido Universi
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Kuroiwa Asato
Laboratory Of Animal Cytogenetics Center For Advanced Science And Technology Hokkaido University
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Kuroiwa Asato
Cast Hokkaido Univ.
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Kuroiwa Asato
Laboratory Of Cytogenetics Faculty Of Science Hokkaido University
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Agata Kiyokazu
Group For Evolutionary Regeneration Biology Center For Developmental Biology Riken Kobe
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Ando Junko
Lab. Anim. Cytogenet. Center Advanced Sci. Tech.
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Yamada Kazuhiko
Lab. Animal Cytogenet. Dept. Genome Dyn. Creative Res. Initiative "sousei
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Kuratani Shigeru
Lab. for Evol. Morph, RIKEN CDB
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Matsuda Yoichi
Lab. Anim. Cytogenet Creative Res. Initiative "sousei" Hokkaido Univ.
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Ishijima Junko
Lab. Animal Cytogenet. Creat. Res. Initiatit. "sousei" Hokkaido Univ.
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Matsuda Yoichi
Grad. Sch. Life Sci. Hokkaido Univ.:lab. Anim. Cytogenet. Div. Genome Dyn. Creative Res. Initiative
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Tarui Hiroshi
Evolutionary Regeneration Group Center For Developmental Biology
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Nishida-umehara Chizuko
Lab. Anim. Cytogenet Creative Res. Initiative "sousei" Hokkaido Univ.
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Nishiyama Chigusa
Grad. Sch. Sci. Hokkaido Univ.
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Kuratani S
Lab. For Evol. Morph Riken Cdb
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Kuratani Shigeru
Department Of Anatomy Faculty Of Medicine University Of The Ryukyus
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Agata Kiyokazu
Lab. For Mol. Dev. Biol. Dept. Of Biophys. Grad. Sch. Of Sci. Kyoto Univ.
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Matsuda Yoichi
Cent. Adv. Sci. Tech. Hokkaido Univ.:grad. Sch. Environ. Earth Sci. Hokkaido Univ.:fac. Sci. Hokkaid
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Nishida Chizuko
Lab. Anim. Cytogenet Creative Res. Initiative "sousei" Hokkaido Univ.
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NISHIMURA Osamu
RIKEN Center for Developmental Biology
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Nishida-umehara Chizuko
Grad. Sch. Sci. Hokkaido Univ.
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Murakami Takahiro
Creative Research Initiative "sousei" Hokkaido Univ.
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Kuroiwa Asato
Hokkaido Univ. Hokkaido Jpn
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