Immunogenetic status and breeding value of Holstein cows

Vladimir Kaishev,Madina Tleinsheva,Anzor Zhilyaev,Ibragim Taov,Tamirlan Kudaev,R.Z Abdulkhalikov

doi:10.1051/e3sconf/202126202012

Vladimir Kaishev, Madina Tleinsheva + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/202126202012

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Abstract

In the genealogical structure of the breeding stock, the highest specific weight is occupied by the Reflection Sovering and Vis bek Aydiala lines, accounting for 56.8 and 39.9% of animals, respectively. The study results of Holstein cattle blood-group factors can be used to monitor its gene pool, genetic intrabreed differentiation, assess selection parameters, and conduct targeted selection of parental pairs. It was determined that in EAA blood group system in Holstein cows of reproduction from the USA, the frequency of A1 antigen is 58.7%, and in domestic reproduction animals, this antigen is found with a lower frequency of 50.7%. At the same time, in the specified system of blood groups in both groups of experimental animals, antigen “a” is characterized by the highest frequency, the lowest occurrence is A2 antigen, and animals with A1 antigen took an intermediate position. In EAB system, the US Holstein cows have a higher frequency of such antigens as Е3/, О3 и I1 compared to the reproductive animals of Agro-Soyuz LLC. The EAF blood group system is represented by two antigens, where F antigen frequency in both groups of experimental animals is 100%. Of all the blood group systems, the greatest differences between compared groups of animals were detected for the antigens of EAZ blood group system.

Highlights

Within the framework of “Agro-Industrial Complex Development" national project implementation in the republics of the North Caucasus region, Holstein breed animals are imported from various countries, distinguished by high indicators of productivity
To study the immunogenetic status of cows in the laboratory of immunogenetics, biochemistry and general chemistry of the State Scientific Institution "Stavropol Scientific Research Institute of livestock breeding and forage production", blood group systems and antigenic differences were determined according to generally accepted method in 75 Holstein cows imported by heifers from the USA, as well as from daughters received under conditions of Agro-Soyuz LLC
Holstein breed bulls of the Reflection Sovering line exceeded the bulls of the Vis Bek Aydiala line in milk yield by 0.86%, in terms of the mass fraction of fat and protein - by 0.04 and 0.04 abs.%, in terms of the total amount of milk fat and protein - by 11.0 and 8.0 kg, or 2.3 and 2.05%, respectively

Summary

Introduction

Within the framework of “Agro-Industrial Complex Development" national project implementation in the republics of the North Caucasus region, Holstein breed animals are imported from various countries, distinguished by high indicators of productivity. As well as the immunogenetic status of Holstein cattle, the frequency of antigens was studied (Table 1). It was found that EAA blood group system is represented by 3 antigens, they have different frequency, due to the genotype of the compared animals.

Results

Conclusion