ЭлБиб

Молочнохозяйственный вестник, №4 (24), IV кв. 2016

207

рефераты

показывают возможность более широкого применения повторного подбора при

разведении молочного скота костромской породы. Использование генетических

маркеров групп крови при планировании подбора, позволяют выявить их наиболее

желательные варианты.

Summary

Datas of using homogeneous selection in purebred cow families has been

considered in the article. The research has been organized at “Experimental farm

“Karavaevo” in 2015 (Kosroma region). The materials of zootechnical and pedigree

records from 1990 to 2014 years have been used in the research. Based on the dates

22 new factory families have been formed. In this processing were included 385 animals

with a reliable origin have been included in the processing. The antigens of blood

groups have been defined with hemolytic tests on a standard method. The purpose of

the study is to rationale the using of re-selection in livestock of Kostroma breed. 34

variants of re-selection cows from 19 families to 20 bulls have been identified in new

families. Cows after re-selection exceed other selection types cattle in milk productivity

133kg(Р<0,001) during the 3-rd and more lactation period and 213 kg (Р<0,001) in the

highest lactation time. From 70 re-selection cows 33(47%) have milk productivity more

than 8000 kg during 305 lactation days. It has been noticed high breed value of bulls:

Krik 9194, Ryadoc 3023, Bushuy 2726 Master›s relative 106902, Spike 5169 Leyrd›s

relative group 71151 and Lednik bull 3518 Ladka›s line КТКS-253. High levels of milk

production in purebred families have been observed in animals obtained by selecting

options AB × BB, AB × AB, BC × AA by EAB - blood group locus. Re-selection is of great

practical importance by preparation of bulls-continuers. Thus our studies has been

shown practical value of reselection in breeding dairy cattle. Taking into consideration

small amounts of Kostroma cattle breed and problems with bull reproduction re-selection

using is an actual task for breeders. That is why our studies show possibility of more

widespread re-selection using in dairy cows breeding. Genetic markers of blood groups

using in selection planning allows to identify their most desirable options.

Электронная Научная СельскоХозяйственная Библиотека