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首页> 外文期刊>Archivos Latinoamericanos de Produccion Animal >Genetic parameters and heterogeneity of variance to milk yield in Murrah breed using Bayesian inference
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Genetic parameters and heterogeneity of variance to milk yield in Murrah breed using Bayesian inference

机译：利用贝叶斯推断的穆拉品种产奶量变异的遗传参数和异质性。

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Data from 2061 lactations of 532 females of the Murrah breed, daughters of 44 sires, calving from 1975 to 2001 were used to evaluate the effects of heterogeneity of variance on genetic evaluation of sires. The standard deviation of the milk yield was used to classify the herds among high and low variability level. An animal model used to estimate variance component, included the fixed effect of herds-year, season of calving, random effect of animal, permanent environment and temporary environment. Variance components were estimated to milk yield at booth levels, considering milk yield in each production level as different trait. Estimates of heritability were 0.39 in general analysis and equal to 0.33 and 0.41 for milk yield in high and low levels, respectively. Genetic correlations between high and low production levels were 0.58. The sires are being selected according to of the environment most changeable when its daughters are in production, of whom properly for its proper genetic breeding.
机译：从1975年至2001年产犊的穆拉（Murrah）品种的532名雌性，雌性44头的雌性的2061次哺乳期中获得的数据用于评估方差异质性对雌性遗传评价的影响。牛奶产量的标准差用于将畜群分为高变异性和低变异性。用于估计方差成分的动物模型包括牧群年的固定效应，产犊季节，动物的随机效应，永久环境和临时环境。将各个生产水平的牛奶产量视为不同特征，以方差水平估算出各个展位水平的牛奶产量。一般分析中遗传力的估计值分别为0.39和0.33，对于高和低水平的牛奶产量分别为0.41。高和低产量水平之间的遗传相关性是0.58。根据其女儿生产时最易变的环境来选择父本，对其进行适当的遗传育种是适当的。

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