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萩谷, 功一; 鈴木, 三義; 河原, 孝吉; PEREIRA, Juan Antonio C.; Domon, Yukio; Tsuruta, Shogo; MISZTAL, Ignacy; Hagiya, Kouichi; Suzuki, Mitsuyoshi; Kawahara, Takayoshi; 土門, 幸男; 鶴田, 彰吾. |
生涯産乳形質に関する遺伝的パラメータの推定および初産形質, 体形形質と長命性との間の遺伝的関連についてEM-REML法を用いた多形質アニマルモデルを使用して分析した. データは, 社団法人北海道酪農検定検査協会に集積された産乳能力検定記録のうち, 1975年から1999年にわたる58,352頭の生涯記録, および社団法人日本ホルスタイン登録協会に集積された体型審査記録および132,096頭からなるそれらの血統記録を使用した. 生涯形質は, 初産分娩後48ヵ月および84ヵ月までの在群期間および生産期間, それらの期間内に生産した総乳量, 総乳脂量, 総無脂固形分量および総乳タンパク質量とした. 初産記録は, 乳量, 乳脂量, 無脂固形分量および乳タンパク質量, および17の体型形質の記録を含む. 生涯産乳形質に関する遺伝率は, 初産分娩後48ヵ月および84ヵ月のいずれの形質においても0.15から0.16の範囲で推定された. 初産および84ヵ月における産乳形質間の遺伝相関係数は, 0.53 (乳量および無脂固形分量) から0.61 (乳脂量) と推定された. 前乳房の付着および乳房の深さは, 初産乳量との間に負の遺伝相関係数 (-0.03および-0.21) が推定されたにもかかわらず, 初産分娩後84ヵ月までの総乳量との間に比較的高い遺伝相関係数 (0.22および0.20) が推定された. Heritabilities for lifetime production and first lactation traits and genetic correlations among these traits were estimated using an animal model. Data consisted... |
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Palavras-chave: Holstein cows; Lifetime production; Genetic parameters. |
Ano: 2002 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2617 |
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KUCHIDA, Keigo; Tsuruta, Shogo; Van Vleck, L. D.; Suzuki, Mitsuyoshi; Miyoshi, Shunzo. |
Factors affecting the difference between the Beef Marbling Standard (BMS) number assigned by examiners (BMSSUB) and the BMS number estimated from marbling percentage by image analysis (BMSFAT) were investigated. Pictures of ribeye area of 106 Japanese Black steers with BMSSUB were used. Marbling percentage in ribeye area,means and standard deviations of the area and of the form score for marbling particles classified into 5 levels (over 0.01,0.05,0.1,0.5,and 1.0 cm2),and standard deviations of marbling percentages in small areas which were obtained by dividing the ribeye into 4,9,25, and 100 partitions were calculated by image analysis. Multiple regression equations with the difference between BMSSUB and BMSFAT as the dependent variable were obtained by a... |
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Palavras-chave: Image analysis; BMS number; Japanese Black. |
Ano: 1999 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/952 |
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Kuchida, Keigo; Fukaya, Miho; Miyoshi, Syunzou; Suzuki, Mitsuyoshi; Tsuruta, Shogo; 口田, 圭吾; 三好, 俊三; 鈴木, 三義. |
The purpose of this study was to develop a nondestructive prediction method for the yolk: albumen ratio by computer image analysis for candling inspection. Twenty-two to 49 eggs per line were randomly sampled from four chicken lines. After weighing the eggs, the eggs were illuminated by an overhead projector beam through a small hole in dark room. Video images were taken of the eggs from four directions, the eggs rotated each time by 90 degrees. The eggs were broken for measuring egg traits, including the yolk:albumen ratio. The average value obtained from four directions was used for statistical analysis. The ratio of the number of pixels of light and dark parts (light: dark ratio), and the CV of red (R), green (G), and blue (B) components for the whole... |
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Palavras-chave: Yolk; Albumen ratio; Computer image analysis; Prediction method. |
Ano: 1999 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1025 |
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