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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/46996b5b8296-26bf-49bb-bd24-d9908432a006
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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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 | ||||||
言語 | en | |||||
タイトル | B Chromosomes Have a Functional Effect on Female Sex Determination in Lake Victoria Cichlid Fishes | |||||
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
× YOSHIDA, Kohta× TERAI, Yohey× WATANABE, Masakatsu× et, al. |
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著者別名 |
寺井, 洋平
× 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 |
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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 |