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  1. 010 学術雑誌論文
  2. 渡辺, 正勝 / WATANABE, Masakatsu
  1. 010 学術雑誌論文
  2. 寺井, 洋平 / TERAI, Yohei
  1. 000 著者一覧
  2. 寺井, 洋平 / TERAI, Yohei

B Chromosomes Have a Functional Effect on Female Sex Determination in Lake Victoria Cichlid Fishes

https://ir.soken.ac.jp/records/4699
https://ir.soken.ac.jp/records/4699
6b5b8296-26bf-49bb-bd24-d9908432a006
名前 / ファイル ライセンス アクション
fetchObject1.pdf fetchObject1 (1.9 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2014-06-25
タイトル
タイトル B Chromosomes Have a Functional Effect on Female Sex Determination in Lake Victoria Cichlid Fishes
タイトル
タイトル B Chromosomes Have a Functional Effect on Female Sex Determination in Lake Victoria Cichlid Fishes
言語 en
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
著者 YOSHIDA, Kohta

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YOSHIDA, Kohta

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TERAI, Yohey

× TERAI, Yohey

TERAI, Yohey

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WATANABE, Masakatsu

× WATANABE, Masakatsu

WATANABE, Masakatsu

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et, al.

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et, al.

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著者別名 寺井, 洋平

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寺井, 洋平

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抄録
内容記述タイプ Abstract
内容記述 The endemic cichlid fishes in Lake Victoria are a model system for speciation through adaptive radiation. Although the evolution of the sex-determination system may also play a role in speciation, little is known about the sex-determination system of Lake Victoria cichlids. To understand the evolution of the sex-determination system in these fish, we performed cytogenetic analysis in 11 cichlid species from Lake Victoria. B chromosomes, which are present in addition to standard chromosomes, were found at a high prevalence rate (85%) in these cichlids. In one species, B chromosomes were female-specific. Cross-breeding using females with and without the B chromosomes demonstrated that the presence of the B chromosomes leads to a female-biased sex ratio in this species. Although B chromosomes were believed to be selfish genetic elements with little effect on phenotype and to lack protein-coding genes, the present study provides evidence that B chromosomes have a functional effect on female sex determination. FISH analysis using a BAC clone containing B chromosome DNA suggested that the B chromosomes are derived from sex chromosomes. Determination of the nucleotide sequences of this clone (104.5 kb) revealed the presence of several protein-coding genes in the B chromosome, suggesting that B chromosomes have the potential to contain functional genes. Because some sex chromosomes in amphibians and arthropods are thought to be derived from B chromosomes, the B chromosomes in Lake Victoria cichlids may represent an evolutionary transition toward the generation of sex chromosomes.
書誌情報 PLoS Genetics
en : PLoS Genetics

巻 7, 号 8, p. e1002203, 発行日 2011
出版者
出版者 Public Library of Science
ISSN
収録物識別子タイプ ISSN
収録物識別子 1553-7390
DOI
関連タイプ isIdenticalTo
識別子タイプ DOI
関連識別子 https://doi.org/10.1371/journal.pgen.1002203
関連名称 10.1371/journal.pgen.1002203
権利
権利情報 © 2011 Yoshida et al.
関連サイト
識別子タイプ URI
関連識別子 http://www.plos.org/open-access/
関連名称 Copyright
フォーマット
内容記述タイプ Other
内容記述 application/pdf
著者版フラグ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
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