Data/hora: 05/06/2024 04:23:06

Provedor de dados: | 19
País: | Japan

Título:

黒毛和種枝肉横断面の画像解析形質と発育性ならびに飼料利用性間の遺伝的関連性

Genetic relationships of growth and feed utilization traits with carcass and image analysis traits for Japanese Black steers in progeny test

Autores: | 大澤, 剛史; 日高, 智; 加藤, 浩二; 口田, 圭吾; Osawa, Takefumi; Hidaka, Satoshi; Kato, Koji; Kuchida, Keigo.
Data: | 2008-05
Ano: | 2008
Palavras-chave: | Carcass traits; Feed utilization traits; Growth traits; Image analysis traits; Japanese Black.
Resumo: | 黒毛和種の発育形質，鈎料利用形質，枝肉格付形質およびロース芯の画像解析形質問の遺伝的関連性について分析した.分析には間接検定材料牛1，492頭を用いた.発育形質は，肥育開始時の体重や体高など6形質，飼料利用形質は，濃厚飼料摂取量や要求率など4形質，枝肉格付形質は， BMSナンバーなど6形質，画像解析形質は，“全体の粒子のあらさ"や“細かさ指数"など6形質を用いた. BMSナンバーと各発育形質および各飼料利用形質間で，低いあるいは無の遺伝相関(-0.13～0.16)が推定さ れたが，“全体の粒子のあらさ”および“細かさ指数”と各発育形質問の遺伝相関は，それぞれ0.17～0.37および-0.29～0.06が推定された.“全体の粒子のあらさ”および“細かさ指数”と濃厚飼料摂取量間の遺伝相関は，それぞれ0.41および-0.23が推定され，それらと要求率聞においては，それぞれ-0.16～-0.07および0.19～0.25が推定された. したがって，発育性や飼料効率が良い個体は，あらい脂肪交雑粒子が増加し，細かい脂肪交雑粒子が減少する遺伝的関連性が示唆された. The purpose of this study was to investigate the genetic relationships among growth traits，feed utilization traits carcass grading traits and image analysis traits in the ribeye of Japanese Black steers. In this analysis，1，492 Japanese Black steers in progeny testing were used. The growth traits consisted of 6 traits including body weight at the start of the fattening period (BWS)，withers height at the start of the fattening period (WHS) and average daily gain in body weight during the fattening period (ADG). The feed utilization traits consisted of concentrate intake (CONINT)，concentrate conversion ratio (CONRA)，digestible crude protein conversion ratio (DCPRA)，and total digestible nutrient conversion ratio (TDNRA). Carcass grading traits consisted of 6 traits such as beef marbling standard (BMS). Digital images of the carcass cross section were taken between the 6-7th rib with photography equipment. Six traits such as fat area ratio (FAR)，overall coarseness of marbling (OCM) and fineness index of marbling particles (FIM) were calculated as image analysis traits in the ribeye. Genetic parameters for these traits were estimated using the AIREMLF90 program. Effects included in the model were station-year-season and birthhplace as fixed effects，age at the beginning of the fattening period as a covariate and additive genetic and residual effects as random effects. Heritability estimates and genetic correlations were estimated using a single-trait animal model and a two-trait animal model，respectively. Heritability estimates for growth traits，feed utilization traits，and image analysis traits were 0.24~0.58，0.50~0.53 and 0.08~0.70，  respectively. Genetic correlations (± SE) of BMS and FAR with growth traits and feed utilization traits were from -0.13 ± 0.10 to 0.16 ± 0.09 and from -0.04 ± 0.09 to 0. 17 ± 0.09， respectively. However，genetic correlations (± SE) of OCM and FIM with growth traits were from 0.17 ± 0.11 to 0.37 ± 0.09 and from -0.29 ± 0.10 to 0.06 ± 0.11，repectively. Genetic  correlations (± SE) of OCM with feed utilization traits were 0.41 ± 0.09，-0.07 ± 0.11，   -0.14 ± 0.10 and -0.16 ± 0.10 for CONINT， CONRA，DCPRA and TDNRA，respectively. Genetic correlations (± SE) of FIM with feed utilization traits were -0.23 ± 0.10，0.19 ± 0.11，0.23 ± 0.11 and 0.25 ± 0.11 for the same traits. Therefore，it was suggested that animals with genetically large body size or good feed efficiencies tended to increase rough marbling particles and to decrease fine marbling particles in ribeye.
Idioma: | Japonês
Identificador: | http://ir.obihiro.ac.jp/dspace/handle/10322/2313
Editor: | 日本畜産学会
Formato: | application/pdf
Fonte: | 日本畜産学会