{"created":"2022-01-27T02:44:30.909434+00:00","id":2002973,"links":{},"metadata":{"_buckets":{"deposit":"a653ce8e-f6f3-4488-9ce9-1ead47ccf20a"},"_deposit":{"id":"2002973","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2002973"},"status":"published"},"_oai":{"id":"oai:u-ryukyu.repo.nii.ac.jp:02002973","sets":["1642837622505:1642837905044:1642837914562","1642838403551:1642838407312"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_1551255647225":"黒毛和種産肉能力直接検定成績からの遺伝的パラメータの推定(畜産学科)","subitem_1551255648112":"ja"},{"subitem_1551255647225":"Heritabilities, genetic and phenotypic correlations of six performance test traits of Japanese Black bulls (Department of Animal Science)","subitem_1551255648112":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"及川, 卓郎","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"新城, 明久","creatorNameLang":"ja"}]},{"creatorNames":[{"creatorName":"Oikawa, Takuro","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Shinjo, Akihisa","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":"1976年度から1981年度まで6年間の黒毛和種産肉能力直接検定成績から, 検定開始時および終了時体重, 1日平均増体量, 粗飼料摂取率, TDN要求率, 産肉能力得点の主要6形質について分散分析により遺伝的パラメータを推定した。用いたデータは, 全国10検定場における911頭の検定雄牛のものである。統計モデルの変動因は, 父牛の系統, 系統内父牛, 検定場, 検定雄牛の出生年次とその季節, 母牛の年齢, 雄牛の検定開始時日齢および雄牛の健康状態とした。分散分析の結果, 検定場の効果, 検定雄牛の出生年次, 季節の効果がほとんどの形質で有意となった。母牛の年齢の効果は検定終了時体重でのみ有意であった。健康状態の効果は, 検定開始時体重と産肉能力得点を除くすべての形質で有意であった。検定開始時および終了時体重, 粗飼料摂取率, TDN要求率の遺伝率は, それぞれ0.33,0.40,0.49,0.43と中位からやや高い遺伝率であった。しかし1日平均増体量および産肉能力得点の遺伝率は, それぞれ0.17,0.24と低い推定値であった。検定開始時体重, 終了時体重, 1日平均増体量および産肉能力得点間には正の高い遺伝相関がみられ, 粗飼料摂取率と検定開始時, 終了時体重間には中位の正の遺伝相関がみられた。1日平均増体量の遺伝率が低い原因としては検定期間の短いことおよび検定開始前の環境の差異による効果が考えられ, また検定場, 年次および季節の効果が大きく, 検定雄牛を遺伝的に評価する場合には, これらの環境要因による補正が不可欠であると考えられる。","subitem_description_type":"Other"},{"subitem_description":"The genetic parameters for 6 performance test traits, initial and final body wt., average daily gain during test period, rate of roughage intake, TDN conversion and final performance score, were estimated from performance test records for Japanese Black bulls. The data consisted of records of 911 bulls of 63 sires at 10 performance test stations. Analysis of variance was done by Method III of Henderson using Harvey's LSML76 computer program. The statistical model included effects of sire line, sire within sire line, station, year and season of birth, age of dam, age of bull at the start of test and health condition. The effects of sire, station, year, season and age of bull were significant. The effect of age of dam was significant only at final body wt.. The effects of health condition were significant except for initial body wt. and final performance score. Heritabilities of initial body wt., final body wt., rate of roughage intake and TDN conversion were 0.33,0.40,0.49 and 0.43,respectively, while, heritabilties of average daily gain and final performance score were low (0.17 and 0.24). The genetic correlations among growth traits and final performance score were high and positive, and the genetic correlation between rate of roughage intake and body wt. was intermediate and positive. The cause of low heritability of average daily gain was possibly caused by short test period and large environmental variation before the start of performance test. The effects of environmental factors like station, year and season should be taken into account, in evaluating genetic performance of bulls using performance test records.","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":"jpn"}]},"item_1617186783814":{"attribute_name":"Identifier","attribute_value_mlt":[{"subitem_identifier_type":"HDL","subitem_identifier_uri":"http://hdl.handle.net/20.500.12000/3944"}]},"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":"1985-12-02","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"32","bibliographicPageEnd":"109","bibliographicPageStart":"103"}]},"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","filename":"KJ00000162241.pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://u-ryukyu.repo.nii.ac.jp/record/2002973/files/KJ00000162241.pdf"},"version_id":"b784a97a-af98-484f-bc6f-3d1d2fe9273f"}]},"item_title":"黒毛和種産肉能力直接検定成績からの遺伝的パラメータの推定(畜産学科)","item_type_id":"15","owner":"1","path":["1642837914562","1642838407312"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-02-14"},"publish_date":"2008-02-14","publish_status":"0","recid":"2002973","relation_version_is_last":true,"title":["黒毛和種産肉能力直接検定成績からの遺伝的パラメータの推定(畜産学科)"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-10-31T01:12:49.902596+00:00"}