The influence of linear conformation traits on the condition of milk productiviti of cows firstborn Ukrainian black-and-white and red-and-white dairy breeds

Keywords: Black-and-White dairy, Red-and-White dairy, power of influence, linear type estimation, yield, firstborn cow.

Abstract

The researches were conducted in the aspect of determining the degree of influence of linear traits on the level of milk productivity of cows of Ukrainian dairy breeds. Experimental data were based on materials obtained in herds of pedigree farms for breeding Ukrainian Black-and-White dairy breed of AF "Mayak" in Zolotoniskyi district of Cherkasy region and LLC "Vladana" Sumy district in Sumy region and farms for breeding of Ukrainian Red-and-White dairy breed of PF AF "Mayak" Cherkasy region and LLC "Mlynivskyi complex" Romenskyi district in Sumy region.According to the variance analysis, found reliable influence of three groups of linear traits and overall assessment on a 100-point scale by the amount of milk yield of cows firstborn for 305 days of lactation.The milk yield of the firstborn of Ukrainian Black-and-White dairy breed of the "Mayak" pedigree farm depended on 33.2% of traits that characterize the dairy type in the complex, 20.6% - development of the body and 19.9% - morphological traits of the udder. An analysis of the power of influence of linear traits on the milk productivity level of the PF "Vladana" cows showed a reliable influence of group complexes of traits characterizing the dairy type, body and udder to yield, respectively - 26.3%, 12.6% and 12.7%.

According to cows assessment of Ukrainian Red-and-White dairy breed, the highest degree of influence on the milk yield variability of the firstborn of "Mayak" and LLC "Mlynivskyi complex" was due traits characterizing the dairy type on (25.7% and 26.8%), udder (20.4% and 30.9%) and the overall estimation for conformation type (27.4% and 29.5%), respectively.

Indicators of variance analysis showed that the milk yield of firstborn cows of both breeds in controlled herds also sufficiently depending on the level of descriptive traits estimation, especially such as height, body depth, angularity, rear width, front and rear udder attachment, central ligament, and locomotion. The fat content of milk didn't depend on the score level of both group and descriptive traits.The presence of influence of linear traits on the milk yield of firstborn cows testified to the effectiveness of breeding of Ukrainian Black-and-White and Red-and-White dairy breeds estimated by the method of linear classification.

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Published
2020-02-24
How to Cite
Khmelnychyi , L., & Vechorka , V. (2020). The influence of linear conformation traits on the condition of milk productiviti of cows firstborn Ukrainian black-and-white and red-and-white dairy breeds. Bulletin of Sumy National Agrarian University. The Series: Livestock, (1 (40), 11-16. https://doi.org/10.32845/bsnau.lvst.2020.1.2

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