Welfare and sperm quality with a focus on stress resistance of Bos taurus

Chernenko, Oleksandr; Prishedko, V. M.; Mylostyvyi, Roman; Shulzhenko, N. M.; Orishchuk, O. S.; Chernenko, O. I.; Tsap, S.; Khmeleva, O. V.

doi:10.15421/2019_780

Cited by 1 publication

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“…The biological and productive characteristics of black-and-white Ural type cows are in constant transformation through selection work. That is why the identification of interrelationships between the traits characterizing the productive qualities of animals is the main direction of the activities of specialists and researchers working to improve the efficiency of cow breeding [10,11,12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Application of correlation and regression analysis in the selection of black-and-white cows

Донник

Chechenikhina

2021

E3S Web Conf.

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The use of the method of correlation-regression analysis as the most widespread method of statistical processing of experimental data makes it possible to organize the selection of animals according to the leading characteristics of productivity. A positive and high correlation was established between milk yield and milk yield in all groups of studied animals (r = from 0.64 to 0.90), and between milk yield in 305 days of lactation and the highest daily milk yield - only in groups of Reflection Sovering and Montvik Chieftain cows. (r = 0.65 to 0.92). Cows of the Vis Back Aydial line have higher correlation coefficients between indicators of milk composition (r = from 0.72 to 0.91, depending on the trait). The calculation of the regression coefficients showed that in the studied groups of animals with an increase in the coefficient of constancy of lactation, the coefficient of milk production and the indicator of the highest daily milk yield per unit, the amount of milk for 305 days of lactation increased by an average of 1.63 - 221.04 kg.

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Section: Introductionmentioning

confidence: 99%