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首页> 外文期刊>African Journal of Biotechnology >Correlation analysis of milk production traits across three generations of Simmental cows
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Correlation analysis of milk production traits across three generations of Simmental cows

机译：三代西门塔尔牛奶粉生产性状的相关分析

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The relationship between milk production traits over whole lactations was evaluated across three generations of Simmental cows (between daughters, dams and granddams) by a corelation analysis with whole lactation traits in the daughter generation being used as the dependent variables (x1), and those in the dam and granddam generations being used as the independent variables (x2?and x3). The results were obtained from a sample of 1170 daughters and as many dams and granddams. The correlation of whole lactation milk production traits between daughters, dams and granddams, as calculated by simple, partial and multiple correlation coefficients was very weak or non-existent. All of the calculated simple and partial correlation coefficients were positive and mostly statistically very significant (P<0.01). The calculated coefficients of multiple correlation (R1.23) between lactation length, milk fat content, milk yield, milk fat yield and 4% FCM yield with the expression of the traits in the daughters being used as the dependent variable and that in the dams and granddams as the independent variable were statistically very significant (P<0.01), amounting to 0.091, 0.251, 0.180, 0.133 and 0.153, respectively.
机译：通过相关分析，将三代西门塔尔牛（子代，大坝和祖母之间）的产奶性状与全泌乳量之间的关系进行了相关分析，以子代中的全泌乳性状为因变量（x1）。大坝和大坝世代被用作自变量（x2和x3）。结果是从1170个女儿以及许多大坝和大坝的样本中获得的。通过简单，部分和多个相关系数计算得出的女儿，大坝和祖母之间的全乳产奶性状的相关性非常弱或不存在。所有计算的简单和部分相关系数均为正，大部分在统计上都非常显着（P <0.01）。泌乳期，乳脂含量，乳产量，乳脂产量和4％FCM产量之间的多重相关系数（R1.23），以子代和大坝的性状表达为因变量和作为独立变量的祖母在统计上非常显着（P <0.01），分别为0.091、0.251、0.180、0.133和0.153。

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