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Estimation of genetic parameters of fatty acids composition in flesh of market size common carp (Cyprinus carpio L.) and their relation to performance traits revealed that selective breeding can indirectly affect flesh quality
genetic correlations genetic improvement growth heritability slaughtering traits, supplemental feeding
2018/11/23
Fish are a rich source of omega-3 polyunsaturated fatty acids (n-3 PUFAs) and thus, they should be an integral part of human diet at least twice a week. As a result, high attention has been devoted to...
用R法估计方差组分的原理、方法和应用Theory, Method and Application of Method R on Estimation of (Co)Variance Components
R法 方差组分 Method R (co)variance components
2007/12/5
综述了R法估计方差组分的原理、方法和应用，目的是使该方法能够得到合理应用。R法是通过计算全数据集对亚数据集随机效应的回归因子（R）来估计方差组分的。利用一种基于一个变换矩阵的多变量迭代算法，结合先决条件的共扼梯度法求解混合模型方程组使R法的计算效率大为改善。R法的主要优点是计算成本低，同时可以得到方差组分估值的抽样误差和近似置信区间。其缺点是对于同样的数据，R法较其他方法的抽样误差大，而且在小样本...