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Genetic correlations among fertility traits and lactation persistency within and across Holstein herds with different milk production during the first three lactations✰
https://obihiro.repo.nii.ac.jp/records/4300
https://obihiro.repo.nii.ac.jp/records/4300577ef656-6a3d-44f4-aae0-20ee23bb2705
名前 / ファイル | ライセンス | アクション |
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full text (577.4 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-01-11 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Genetic correlations among fertility traits and lactation persistency within and across Holstein herds with different milk production during the first three lactations✰ | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Dairy cattle | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Fertility | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Genotype by environment interaction | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Herd milk production | |||||
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 | journal article | |||||
著者 |
Yamazaki, T
× Yamazaki, T× Takeda, Hisato× Osawa, Takefumi× Yamaguchi, Satoshi× 萩谷, 功一 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Genotype by environment interaction (G × E) effects for lactating cows’ fertility traits may differ with lactation number when accounting for herd production level. Our objective here was to investigate the genetic correlations among three fertility traits in cows and lactation persistency within and across herds with different milk-production levels by using lactation records of Japanese Holstein cows (475,446 records for first lactation, 378,540 for second, and 265,560 for third). Herds with data were categorized into three groups (LOW, MID, and HIGH) based on the average herd-year effects in each herd for 305-day milk yield at the first lactation. The fertility traits evaluated were conception rate at first insemination (CR); number of inseminations (NI); and days open (DO). Lactation persistency (PER) was defined as the difference between milk yields at 240 and 60 days in milk. Genetic parameters were estimated within each lactation by using a multiple-trait model that considered the traits of different herd milk-production groups (HPGs) as separate traits. The genetic correlations among fertility traits were estimated by using a three HPG × three-trait animal model; for those between fertility traits and PER we used a three HPG × two-trait (each fertility trait and PER) animal model. The genetic correlations among fertility traits were strong, whereas those between fertility traits and PER were weak and undesirable; most of the values did not differ significantly among HPGs or lactations. Some of the genetic correlations of CR or NI among different HPGs for the second and third lactations were lower than those for the first lactation. These findings suggest that G × E effects on a cow's ability to conceive with respect to herd production level are larger in later lactations than in the first lactation. © 2018 | |||||
言語 | en | |||||
書誌情報 |
en : Livestock Science 巻 219, p. 97-103, 発行日 2019 |
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出版者 | ||||||
言語 | en | |||||
出版者 | Elsevier | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 18711413 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12121438 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1016/j.livsci.2018.12.001 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | This accepted manuscript is licensed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. <http://creativecommons.org/lisenses/by-nc-nd/4.2/> | |||||
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 | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
日本十進分類法 | ||||||
主題Scheme | NDC | |||||
主題 | 645 |