| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2014-06-25 |
| タイトル |
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タイトル |
B Chromosomes Have a Functional Effect on Female Sex Determination in Lake Victoria Cichlid Fishes |
| タイトル |
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タイトル |
B Chromosomes Have a Functional Effect on Female Sex Determination in Lake Victoria Cichlid Fishes |
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言語 |
en |
| 言語 |
|
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
YOSHIDA, Kohta
TERAI, Yohey
WATANABE, Masakatsu
et, al.
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| 著者別名 |
寺井, 洋平
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| 抄録 |
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内容記述タイプ |
Abstract |
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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 |
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出版者 |
Public Library of Science |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1553-7390 |
| DOI |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1371/journal.pgen.1002203 |
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関連名称 |
10.1371/journal.pgen.1002203 |
| 権利 |
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|
権利情報 |
© 2011 Yoshida et al. |
| 関連サイト |
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識別子タイプ |
URI |
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関連識別子 |
http://www.plos.org/open-access/ |
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関連名称 |
Copyright |
| フォーマット |
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内容記述タイプ |
Other |
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内容記述 |
application/pdf |
| 著者版フラグ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
fetchObject1 (1.9 MB)
