METHODS OF FORMING HIGHLY PRODUCTIVE FAMILIES WHEN LEADER BLOODLINE 1926780 HAS BEEN CREATIONG
The aim of the research. To research the possibility of multiplication of highly productive genotypes of animals of the Ukrainian Red-and-White dairy breed and the creation of highly productive families, under the conditions of bloodlinear breeding, through the use of homogeneous selection and different degrees of inbreeding in the selection dairy farms.
Materials and methods of research. The investigation have been in the selection dairy heards fulfilled. Homogeneous selection and different degrees of inbreeding ware used.
Research results. It has been established, that under the conditions of inbloodline breeding animals of the bloodline Leader 1926780 of the Ukrainian Red-and-White dairy breed, the use of homogeneous selection and different degrees of inbreeding, high-productivity cows inherit and stably transmit to the descendants of the next three generations, an increased contents of fat and protein in milk, with a certain increase of milk yield, even with the use of cross bloodlines. These cows, ware, as the ancestors of highly productive families selected.
In result selection of cows for complex of traits, too the sire Agrus red UA3200801693, native selection, which was received by inbloodline breeding with inbreeding in degree (IV–V) on the famous ancestor of Cavaler 1620273 bloodline (the milk yield of 94 daughters of which, for 305 days of the first lactation was 8739 кg with fat contents 3.96% and protein – 3.17%, аnd bull`s selection value was +1071 кg, +0.18% of fat and +0.02% protein), a number of high productivity cows, which inherited high milk yield (8000 кg and more), fat contents (3.9–4.3%) and protein (3.30–3.46%), in dairy farm «Vidrodshennia», was received. These animals ware determined as ancestors of highly productive familiaes. For example, the cows:Taiga UА4600487037, the milk yield for the 305 days of second lactation was 7244 кg, fat contents 3.88% and protein – 3.30%; Holubka UA4600487021, the milk yield for the 305 days of first lactation was 9285 кg, fat contents 3.85% and protein – 3.31%; Макіvка UA4600487021, the milk yield for the 305 days of third lactation was 8866 кg, fat contents 3.70% and protein – 3.23%; Virna UA80112320831, the milk yield for the 305 days of first lactation was 8433 кg, fat contents 3.78% and protein – 3.28%. For the exterior type traits thiese cows corresponded to desirable type of Ukrainian Red-and-White dairy breed. From bull Agrus red – improver of complex traits and high productivity cows (Romaschka Red UA7100301055 and Berta UA7100301004) the bulls Roman Red UA7100600148 and Boris UA7100514536 have been received, which in selection of breed ware used.
At present stage selection in bloodline Leader 1926780, the homogeneous selection and different degrees of inbreeding have been implemented. So, the cow Gloria UA8011697061, in this farm, in resalts of the complex inbreeding (V–V; VI) to the ancestor Cavaler 1620273 across the bulls Agrus Red UA3200801693 and Golf DE114468012 has been received. The milk yield after second lactation of this cow was 10750 кg, 3.85%, 414 кg of fat, 3.31% and 325 кg protein. By the creation of Leader bloodline, in some dairy farms, out of aim to ensure by animals of new generarations the increased qualitative traits of milk productivity, we used close and tight inbreeding to the continuers of bloodline. So, in the selection dairy farm of State enterprise Research farm of NAAS Ukraine «Gontarivka», in result of tight inbreeding to the bull Golf DE114468012 (11–1), the cow Facelia UA8011247830 was received. This cow had good type of body, clear expressive dairy type, high reproductive ability. The milk productivity of this cow, for the 305 days of the first lactation, was 9063 kg of milk, 3.76% of fat and 3.15% protein.
Conclusions. So, the highly productive cows, which are recognized as ancestors of familias, in condition of Leader 1926780 bloodline selected, in result the homogeneous selection and different degrees of inbreeding application, stabile transmit to the offspring their qualitative traits of milk (higher fat contents and protein) for the certain increasing of milk yield.
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