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method for identification of cows and bulls for service and zuchtstiermuttern milk with modified coagulationseigenschaften produce

机译:改良混凝作用的奶牛和公牛乳汁及牛肝菌牛奶鉴定方法

摘要

The invention provides a method of estimation milk rennet coagulation properties and methods of generating cattle population, producing milk with modified coagulation properties. Milk with modified coagulation properties produced using the methods and cattle population of the invention has average curd firmness (E30) above 34.75 mm and average coagulation time (R) less than 7.2 min. Invention provides a method of generating a cattle population by assessing firmness of curd and coagulation time at least 3 times during the whole lactation and by using Legendre polynomials estimate the level of these traits within lactation. Individual coagulation curves of E30 and R are obtained and comparing average level with reference level, cows, bull dams and sires (on the basis of their daughters) with desired milk coagulation properties are identified. Invention provides a method of identification of cows; bull dams and sires producing the whole lactation milk with average firmness of curd above 30.43 and below 26.07 mm using ?-casein genotypes.
机译:本发明提供了一种估计乳凝乳酶凝结特性的方法以及产生牛群,生产具有改良的凝结特性的乳的方法。使用本发明的方法和牛群生产的具有改良的凝结特性的牛奶具有高于34.75 mm的平均凝乳硬度(E30)和少于7.2分钟的平均凝结时间(R)。本发明提供了一种通过在整个泌乳期间至少3次评估凝乳的牢固性和凝结时间并且通过使用Legendre多项式来估计泌乳内这些性状的水平来产生牛群的方法。获得了E30和R的各个凝血曲线,并将平均水平与参考水平进行了比较,确定了具有所需牛奶凝结特性的母牛,公牛水坝和父亲(基于其女儿)。本发明提供了一种鉴定母牛的方法。使用α-酪蛋白基因型生产全泌乳的公牛水坝和母马,其凝乳平均硬度在30.43毫米以上和26.07毫米以下。

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