Genetic Parameter Estimation of Carcass Traits of Duroc Predicted Using Ultrasound Scanning Modes
Genetic Parameter Estimation of Carcass Traits of Duroc Predicted Using Ultrasound Scanning Modes
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使用超声扫描模式预测杜洛克屠体性状的遗传参数估计
DOI：
10.5713/ajas.2006.1379
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Young Chang Lee
中科院分区：
文献类型：
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作者：
A. Salces;K. Seo;Kyuho Cho;S. Kim;Young Chang Lee
从 1998 年至 2004 年，从韩国动物改良协会 (KAIA) 注册的三个农场收集了总共 6,804 条杜洛克品种记录，对其中两种超声波模式（A 和 B）的记录进行了分析，以估计胴体性状的方差分量。测量了三个胴体性状：背膘厚度（bf）、腰眼肌肉面积（Ima）和瘦肉百分比（Imp）。使用 MTDFREML（Boldman 等人，1993），将这些性状分别分析为超声模式 A 的 bfl、Imal 和 lmp1 以及超声模式 B 的 bf2、lma2 和 lmp2 以及多性状动物模型。所有性状均显示出中等遗传力值。 bfl、bf2、Imal、lma2、lmp1 和 lmp2 的估计遗传力分别为 0.45、0.39、0.32、0.25、0.28 和 0.39。性状 bfl 和 bf2、Imal 和 lma2、Impi 和 lmp2 的估计遗传相关性为正但较低。具体而言，bfl 和 bf2 之间的遗传相关性为 0.30，而 Imal 和 lma2 之间以及 Impi 和 lmp2 之间的瘦肉性状估计值分别为 0.15 和 0.18。相反，bfl 与瘦性状 lma2、lmp2 之间存在高度负遗传相关性。同样，Imal 和 lma2 以及 Impi 和 lmp2 之间的估计遗传相关性也很低。
A total of 6,804 records for Duroc breed were collected from three farms registered at the Korean Animal Improvement Association (KAIA) from 1998 to 2004 of which both records from two ultrasound modes (A and B) were analyzed to estimate the variance components of carcass traits. Three carcass traits backfat thickness (bf), loin eye muscle area (Ima) and lean meat percentage (Imp) were measured. These traits were analyzed separately as bfl, Imal and lmp1 for ultrasound mode A and bf2, lma2 and lmp2 for ultrasound mode B with multiple trait animal model by using MTDFREML (Boldman et al., 1993). All the traits revealed medium heritability values. Estimated heritabilities for bfl, bf2, Imal, lma2, lmp1 and lmp2 were 0.45, 0.39, 0.32, 0.25, 0.28 and 0.39, respectively. Estimated genetic correlations for traits bfl and bf2, Imal and lma2, Impi and lmp2 were positive but low. Specifically, genetic correlations between bfl and bf2 was 0.30 while the estimates for lean traits between Imal and lma2 and between Impi and lmp2 were 0.15 and 0.18, respectively. Conversely, high negative genetic correlations existed between bfl and the lean traits lma2, lmp2. Likewise, the estimated genetic correlations between Imal and lma2 and Impi and lmp2 were low.