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Selection for Growth and Feed Efficiency : The Australian Experience
http://hdl.handle.net/10097/30960
http://hdl.handle.net/10097/30960a0307584-54ed-4610-b7ad-3ac6b228b7de
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00004370132.pdf (763.0 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2008-05-02 | |||||||||
| タイトル | ||||||||||
| タイトル | Selection for Growth and Feed Efficiency : The Australian Experience | |||||||||
| 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 | departmental bulletin paper | |||||||||
| 著者 |
ARTHUR, P. E.
× ARTHUR, P. E.
× HERD, R. M.
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| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | Profitability in beef production is influenced by a number of traits, including growth and feed efficiency. This paper reviews key Australian selection experiments on growth and feed efficiency, and the beef industry adoption of selection for these traits. Response to selection for growth has been demonstrated by a divergent selection experiment. Five generations of divergent selection for growth resulted in 19% divergence in yearling weight and 18% in weaning weight, and no effect on carcass composition at maturity. Selection for growth in industry herds started in the 1980s, with a steady rate of genetic gain being achieved. In Australian Angus seedstock population, for example, the annual genetic gain in estimated breeding values (EBVs) for 400-day weight was 0.15 standard deviation units from 1998 to 2003. As with growth, selection for feed efficiency has been demonstrated by a divergent selection experiment for residual feed intake (RFI). Two generations of selection produced an annual divergence of 0.25kg/day of 10MJ ME feed with no correlated responses in growth and meat quality of young cattle. Cow weight and reproduction were not affected, however, High RFI cows tended to have higher subcutaneous fat depth relative to Low RFI cows. Testing for RFI in industry herds started in 1996, and from 2002, RFI EBVs are provided for seedstock Angus and Hereford cattle. Several studies have indicated substantial economic benefit from selection for low RFI, however the initial high cost of testing to identify superior animals is an impediment to industry adoption. | |||||||||
| 書誌情報 |
Journal of Integrated Field Science 巻 3, p. 59-66, 発行日 2006-03 |
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| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 2433-6122 | |||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AA12005506 | |||||||||
| 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 | |||||||||
| 出版者 | ||||||||||
| 出版者 | Field Science Center, Graduate School of Agricultural Science, Tohoku University | |||||||||
| 資源タイプ | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 紀要類(bulletin) | |||||||||
| 登録日 | ||||||||||
| 日付 | 2008-05-02 | |||||||||
| 日付タイプ | Created | |||||||||
| 公開日（投稿完了日） | ||||||||||
| 日付 | 2008-05-02 | |||||||||
| 日付タイプ | Created | |||||||||
| 発行日 | ||||||||||
| 日付 | 2006-03 | |||||||||
| 日付タイプ | Created | |||||||||
| フォーマット | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 762960 bytes | |||||||||
| 更新日 | ||||||||||
| 日付 | 2018-01-04 | |||||||||
| 日付タイプ | Created | |||||||||
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Cite as
ARTHUR, P. E., HERD, R. M., 2006, Selection for Growth and Feed Efficiency : The Australian Experience: Field Science Center, Graduate School of Agricultural Science, Tohoku University, 59–66 p.
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