{"_buckets": {"deposit": "3fb49f4b-e407-478e-9bb0-3907759ecc38"}, "_deposit": {"id": "2003424", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "2003424"}, "status": "published"}, "_oai": {"id": "oai:u-ryukyu.repo.nii.ac.jp:02003424", "sets": ["1642837908174", "1642838407312"]}, "author_link": [], "item_1617186331708": {"attribute_name": "Title", "attribute_value_mlt": [{"subitem_1551255647225": "四倍体コムギとその仮想祖先種の数量分類的関係(農学科)", "subitem_1551255648112": "ja"}, {"subitem_1551255647225": "A Quantitative Study of Morphological Relationships among Natural Tetraploid Wheats and Their Putative Ancestors (Department of Agriculture)", "subitem_1551255648112": "en"}]}, "item_1617186419668": {"attribute_name": "Creator", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "石井, 啓豊", "creatorNameLang": "ja"}]}, {"creatorNames": [{"creatorName": "Ishii, Hirotoyo", "creatorNameLang": "en"}]}]}, "item_1617186476635": {"attribute_name": "Access Rights", "attribute_value_mlt": [{"subitem_1522299639480": "open access", "subitem_1600958577026": "http://purl.org/coar/access_right/c_abf2"}]}, "item_1617186626617": {"attribute_name": "Description", "attribute_value_mlt": [{"subitem_description": "四倍体コムギは, 雑種不稔によって, お互いに隔離されている2群, すなわちエンマーコムギとチモフェビーコムギから成る。これら2群は, それぞれAABB, AAGGのゲノム構成を持ち, 二倍体コムギの持つAゲノムを共有している。BゲノムとGゲノムは, 部分的な染色体対合しか起さない為, 部分相同ゲノムであるといわれてきたが, これらの関係は, 必ずしも明きらかにされてはいない。一方, 四倍体コムギの起原についても, 多くの研究があり, 特にBゲノム分析種として, エギロプス属シトプシス節に属するAe. speltoides, Ae. bicornis等があげられてきたが, いずれも確定的な根拠はない。本実験は, 形態の比較研究から, これらの種が, 四倍体コムギの祖先種として妥当であるか否かを, 判定する為に行われた。材料は, 二倍体コムギ, 上記シトプシス節の4種, 両者の人為合成同質及び異質四倍体, 及び四倍体コムギの合計22系統を用い, 主として倍数化に伴う形態の変化と, 合成異質四倍体と四倍体コムギの形態的類似の程度に着目した。形態の分析には, 数量分類の方法を用いた。すなわち, 各系統について33の形質の調査を行い, その結果から, 系統間の相関係数をすべての組み合せについて求めた。こうして得られた相関行列をSokal\u0027s weighted variable group methodとCentroid factor analysisの2方法で解析し, 形態の類似度に基づく類縁関係を, 明らかにした。その結果, 本実験で用いた異質四倍体は, それらだけで, 1つの群を構成し, それらは, 全体として両親種の両方にほぼ等しい類縁度を示した。しかし, この群は, 四倍体コムギの群とは, はっきりと異っていた。従って, 形態の類似度に基づけば, シトプシス節の種は, 四倍体コムギの直接の祖先としては, 不適格であると結論される。", "subitem_description_type": "Other"}, {"subitem_description": "In order to clarify the morphological relationships between di- and tetraploid wheats and diploid Aegilops species of the Sitopsis section, and to test the validity of some previous hypothesis about origin of the second genome of tetraploid wheats, thirteen strains of natural species of the genus Triticum and Aegilops and nine artificially synthesized auto- and allotetraploids were studied using two methods of numerical taxonomy. Data were taken for 33 morphological characters in each strain. Based on these data, between-strains correlation coefficients were calculated as indices of the degree of similarity and resultant correlation matrix was analyzed by the Sokal\u0027s weighted variable group method of cluster analysis and the centroid method of factor analysis. Both analyses gave fundamentaly similar results with the basic concordance to the classical classification. The results suggested the following points : The autotetraploidization did not induce radical changes in morphology, while allotetraploids had an intermediate morphology to their diploid parents. The natural tetraploid wheats formed a different group from the synthesized allotetraploids that were assumed as a putative ancestor of the tetraploid wheats by many workers. Therefore, it may be concluded morphologically that the tetraploid wheats do not resemble so closely the synthesized allotetraploids as to consider them as the putative type of the tetraploid wheats.", "subitem_description_type": "Other"}, {"subitem_description": "紀要論文", "subitem_description_type": "Other"}]}, "item_1617186643794": {"attribute_name": "Publisher", "attribute_value_mlt": [{"subitem_1522300295150": "ja", "subitem_1522300316516": "琉球大学農学部"}]}, "item_1617186702042": {"attribute_name": "Language", "attribute_value_mlt": [{"subitem_1551255818386": "eng"}]}, "item_1617186783814": {"attribute_name": "Identifier", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", "subitem_identifier_uri": "http://hdl.handle.net/20.500.12000/4456"}]}, "item_1617186920753": {"attribute_name": "Source Identifier", "attribute_value_mlt": [{"subitem_1522646500366": "ISSN", "subitem_1522646572813": "0370-4246"}, {"subitem_1522646500366": "NCID", "subitem_1522646572813": "AN00250548"}]}, "item_1617186941041": {"attribute_name": "Source Title", "attribute_value_mlt": [{"subitem_1522650068558": "ja", "subitem_1522650091861": "琉球大学農学部学術報告"}, {"subitem_1522650068558": "en", "subitem_1522650091861": "The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus"}]}, "item_1617187056579": {"attribute_name": "Bibliographic Information", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "1972-12-01", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "19", "bibliographicPageEnd": "85", "bibliographicPageStart": "75"}]}, "item_1617258105262": {"attribute_name": "Resource Type", "attribute_value_mlt": [{"resourcetype": "departmental bulletin paper", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_1617265215918": {"attribute_name": "Version Type", "attribute_value_mlt": [{"subitem_1522305645492": "VoR", "subitem_1600292170262": "http://purl.org/coar/version/c_970fb48d4fbd8a85"}]}, "item_1617605131499": {"attribute_name": "File", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "download_preview_message": "", "file_order": 0, "filename": "KJ00000162398.pdf", "future_date_message": "", "is_thumbnail": false, "mimetype": "", "size": 0, "url": {"objectType": "fulltext", "url": "https://u-ryukyu.repo.nii.ac.jp/record/2003424/files/KJ00000162398.pdf"}, "version_id": "a1f4016a-1f87-46e2-b9bb-306647a933f7"}]}, "item_title": "四倍体コムギとその仮想祖先種の数量分類的関係(農学科)", "item_type_id": "15", "owner": "1", "path": ["1642837908174", "1642838407312"], "permalink_uri": "http://hdl.handle.net/20.500.12000/4456", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2008-02-14"}, "publish_date": "2008-02-14", "publish_status": "0", "recid": "2003424", "relation": {}, "relation_version_is_last": true, "title": ["四倍体コムギとその仮想祖先種の数量分類的関係(農学科)"], "weko_shared_id": -1}