ESTIMATION OF DIRECT AND MATERNAL HERITABILITY AND GENETIC CORRELATION FOR BACKFAT AND GROWTH-RATE IN SWINE USING DATA FROM CENTRALLY TESTED YORKSHIRE BOARS
ESTIMATION OF DIRECT AND MATERNAL HERITABILITY AND GENETIC CORRELATION FOR BACKFAT AND GROWTH-RATE IN SWINE USING DATA FROM CENTRALLY TESTED YORKSHIRE BOARS
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DOI：
10.2527/1992.7061755x
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发表时间：
1992-06-01
影响因子：
3.3
通讯作者：
KRIESE, LA
中科院分区：
文献类型：
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作者：
BRYNER, SM;MABRY, JW;KRIESE, LA
这项研究的目的是估计在美国中央测试站测试的猪中回脂和增长率方差和协方差的组成部分。从1984年到1990年，从26个中央野猪测试站收集了数据。分析的特征被调整为104.5公斤，并调整为36公斤的测试重量。分析了7,951辆纯种约克郡公猪的记录。当代群体被定义为在测试局中经过测试和出售的品种的野猪。使用具有多特征的父亲孙子模型的伪预测方法估算方差成分。据估计，反击和ADG的直接遗产分别为.56和.24。直接的母体影响对于回头脂肪和ADG都是显着的。他们分别占差异的11％和23％。反脂肪和ADG之间的添加遗传相关性约为零。在经过中央测试的约克郡公猪的这一人群中，反背脂的遗传力似乎很高，而对于ADG来说，遗传力对每个性状都有显着的孕产妇影响。
The purpose of this study was to estimate components of variance and covariance for backfat and growth rate in swine tested in central test stations in the United States. Data were collected from 26 central boar test stations from 1984 through 1990. The traits analyzed were backfat adjusted to a 104.5-kg basis and ADG adjusted to a 36-kg on-test weight. Records from 7,951 purebred Yorkshire boars were analyzed. Contemporary groups were defined as boars of a breed that were tested and sold as a common group in a test station. Variance components were estimated using a pseudo-expectation method with a multiple-trait, sire-maternal grandsire model. Direct heritabilities for backfat and ADG were estimated to be .56 and .24, respectively. Direct maternal effects were significant for both backfat and ADG; they accounted for 11 and 23% of the variance, respectively. The additive genetic correlation between backfat and ADG was approximately zero. Within this population of centrally tested Yorkshire boars, heritability seems to be high for backfat and moderate for ADG, with a significant maternal effect on each trait.