@article{oai:rakuno.repo.nii.ac.jp:00000703,
 author = {萩谷, 功一 and 大澤, 剛史 and 白井, 達夫 and 寺脇, 良悟 and 山崎, 武志 and 長嶺, 慶隆 and 伊藤, 文彰 and 河原, 孝吉 and 増田, 豊 and 鈴木, 三義},
 issue = {2},
 journal = {日本畜産学会報},
 month = {May},
 note = {Article, ホルスタイン種雌牛の受胎率について，多形質アニマルモデルによる推定育種価の信頼性について検討した．データは，1985年から2010年までに分娩した2,246,286個体における未経産，初産および2産次の授精記録，初産乳量および血縁情報である．受胎率は初回授精における成否を表す．受胎率および空胎日数の遺伝評価に含めた効果は，牛群・年次（母数），授精月（母数），授精月齢（母数），交配相手種雄牛（変量），個体（変量）および残差（変量）とした．受胎率の推定育種価の平均信頼度は，受胎率のみ（未経産，初産および2産）を含む3形質モデルを採用したとき，後代検定済み種雄牛について未経産0.40，初産0.40および2産0.37であったが，受胎率３形質に加え，初産乳量および初産-2産間の空胎期間を含めた5形質モデルを採用したとき，それぞれ0.46，0.59および0.42に増加した. We investigated the reliability of estimated breeding values (EBV) of conception rate (CR) using multiple-trait animal model. Data were records of artificial insemination (AI) and milk yield from 2,246,286 female animals calved between 1985 and 2010 with their pedigree records. CR was defined as a value of 0 or 1 of which first AI was a failure or success. Various effects were considered for CR and days open between first- and second-calving (DO) (herd-year (fixed), month at AI (fixed), age at AI (fixed), mating sire (random), animal (random), residual (random)) in the statistical models. When three trait model of CRs (CR of heifers, CR of first lactation cows and CR of second lactation cows) was used, average reliabilities of EBV of proven bulls for CR were 0.40, 0.40 and 0.37 for heifers, first lactation cows and second lactation cows, respectively. The highest reliability (0.46, 0.59 and 0.42, respectively) of EBV of bulls for CR were obtained from five-trait model (CRs, milk and DO) .},
 pages = {131--138},
 title = {多形質アニマルモデルによるホルスタイン種雌牛の受胎率に関する推定育種価の信頼性},
 volume = {85},
 year = {2014}
}