{"created":"2023-06-20T13:23:37.853949+00:00","id":4699,"links":{},"metadata":{"_buckets":{"deposit":"83c4e260-784e-4c45-a627-661f5c85622b"},"_deposit":{"created_by":21,"id":"4699","owners":[21],"pid":{"revision_id":0,"type":"depid","value":"4699"},"status":"published"},"_oai":{"id":"oai:ir.soken.ac.jp:00004699","sets":["1:283","1:345","97:344"]},"author_link":["3119","3031","1638","3118","346"],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"8","bibliographicPageStart":"e1002203","bibliographicVolumeNumber":"7","bibliographic_titles":[{"bibliographic_title":"PLoS Genetics"},{"bibliographic_title":"PLoS Genetics","bibliographic_titleLang":"en"}]}]},"item_10001_creator_3":{"attribute_name":"著者別名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"寺井, 洋平"}],"nameIdentifiers":[{},{},{}]}]},"item_10001_description_19":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"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.","subitem_description_type":"Abstract"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Public Library of Science"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"10.1371/journal.pgen.1002203"}],"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doi.org/10.1371/journal.pgen.1002203 ","subitem_relation_type_select":"DOI"}}]},"item_10001_relation_17":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"Copyright"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://www.plos.org/open-access/","subitem_relation_type_select":"URI"}}]},"item_10001_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"© 2011 Yoshida et al."}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1553-7390","subitem_source_identifier_type":"ISSN"}]},"item_10001_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"YOSHIDA, Kohta "}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"TERAI, Yohey"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"WATANABE, Masakatsu"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"et, al."}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2014-06-25"}],"displaytype":"simple","filename":"fetchObject1.pdf","filesize":[{"value":"1.9 MB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"fetchObject1","url":"https://ir.soken.ac.jp/record/4699/files/fetchObject1.pdf"},"version_id":"79d1ce03-7f7a-4098-b648-fde70e2e03e1"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"B Chromosomes Have a Functional Effect on Female Sex Determination in Lake Victoria Cichlid Fishes","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"B Chromosomes Have a Functional Effect on Female Sex Determination in Lake Victoria Cichlid Fishes"},{"subitem_title":"B Chromosomes Have a Functional Effect on Female Sex Determination in Lake Victoria Cichlid Fishes","subitem_title_language":"en"}]},"item_type_id":"10001","owner":"21","path":["109","283","344","345"],"pubdate":{"attribute_name":"公開日","attribute_value":"2014-06-25"},"publish_date":"2014-06-25","publish_status":"0","recid":"4699","relation_version_is_last":true,"title":["B Chromosomes Have a Functional Effect on Female Sex Determination in Lake Victoria Cichlid Fishes"],"weko_creator_id":"21","weko_shared_id":21},"updated":"2023-06-20T14:16:23.137523+00:00"}