Dependence of productive and technological indicators on breeding value of dairy breeds heifers
Journal Title: Наукові горизонти. Scientific Horizons - Year 2018, Vol 71, Issue 9
Abstract
The heifers of dairy breeds with high breeding value (SI > 1500) are charac-terized by maximum productive traits that exceed the average for the herd. That makes it possible to predict the results of breeding work on the signs of dairy production in the future. Animals of the Holstein breed with low breeding value (SI < -1500) have maximum values of udder measurements, lengths and diameter of nipples, which exceed the average indicators of signs in the herd. The distance between the front, rear and between the front and rear nipples has maximum values, which is typi-cal for heifers with a selection index from -1500 to 1500. At the same time, high-value heifers (SI > 1500) have the highest single yield and milk flow intensity. Heifers of Ukrainian Black-and-White dairy breed with high breeding poten-tial (SI > 1500) showed the maximum values of measurements of udder, nipples and functional characteristics. High value heifers (SI > 1500) of the Ukrainian Red-and-White dairy breed are characterized by the largest measurements of the udder (width, depth, dis-tance from the bottom to the ground) and the distance between the front, rear and between the front and rear nipples. But the highest girth, length of the udder and the length and diameter of nipples have animals of the same breed with a selec-tion index from -1500 to 1500. Heifers with relatively low (SI < -1500) breeding potential are characterized by maximum values of functional characteristics. Comparing the research breed groups with each other, it should be noted that the best, both in morphological and functional udder properties, were heifers of Ukrainian Black-and-White dairy breed of high breeding value (SI> 1500).
Authors and Affiliations
I. Ivanov, A. Didkivskii
Keywords
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- EP ID EP631677
- DOI 10.33249/2663-2144-2018-71-9-10-133-139
- Views 64
- Downloads 0
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