Zhubantaev IN, Nasambayev ЕG, Doszhanova AO, Kayumov FG, Tretyakova RF.

Animal Husbandry and Fodder Production. 2026. Vol. 109. No. 1. Р. 55-70.

doi: 10.33284/2658-3135-109-1-55

Original article

Improving the method of testing beef bulls by their own performance

 

Izimgali N Zhubantaev1, Edige G Nasambayev2, Aidana О Doszhanova3, Foat G Kayumov4,

Ruziya F Tretyakova5

1,2,3West Kazakhstan Innovation and Technological University, Uralsk, Republic of Kazakhstan

4,5Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy

of Sciences, Orenburg, Russia

1zhubantayev_i@mail.ru,  http://orcid.org/0000-0002-9218-5414

2nasambaeve@mail.ru, http://orcid.org/0000-0002-0995-7832

3aiduks_93@mail.ru, http://orcid.org/0000-0002-5666-4645

4nazkalms@mail.ru, https://orcid.org/0000-0001-9241-9228

5kserev_1976@mail.ru, https://orcid.org/0000-0002-5155-4295

 

Abstract. The results of a study on testing Kazakh White-Headed bulls for individual performance are presented. The research examined the age dynamics of live weight, average daily gain, body measurements  and  conformation  indices,  feed  costs  per  1  kg  of  live  weight  gain,  meat traits at 12 and 15 months of age, class and index evaluations of breeding value, as well as several selection and genetic parameters of the most important breeding and productive traits. The average live weight of Kazakh White-Headed bulls tested for individual performance at 8 months of age was 229.9 kg, which exceeds the breed standard by 20 kg, indicating high milk productivity of the cows and good feeding conditions for the bulls after weaning. The live weight of the bulls at 12 months of age exceeded the breed standard by 13.9 kg, and at 15 months – by 35.6 kg. Feed consumption per 1 kg of gain during the period from 8 to 12 months averaged 9.7 feed units, and from 8 to 15 months –  9.3 feed units. During the period from 8 to 12 months, 3.4% of the bulls received the complex class “elite” for breeding value, 34.5% – 1st class, and 62.1% –  2nd class, while the selection index above 100 was achieved by 17.2% of the bulls, and 82.8% scored below 100. During the period from 8 to 15 months, 7.0% of the bulls received the complex class “elite-record”, 58.6% –  “elite”, and 3.4% – 1st class, while the proportion of bulls with a complex selection index above 100 amounted to 10.3%, and below 100 –  89.7%.

Keywords: bulls, Kazakh White-Headed, individual performance testing, live weight, average daily gain, meat traits, class evaluation, index evaluation

For citation: Zhubantaev IN, Nasambayev ЕG, Doszhanova AO, Kayumov FG, Tretyakova RF. Improving the method of testing beef bulls by their own performance. Animal Husbandry and Fodder Production. 2026;109(1):55-70. (In Russ.). https://doi.org/10.33284/2658-3135-109-1-55

 

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            Information about the authors:

            Izimgali N Zhubantaev, Cand. Sci. (Agriculture), Vice-Rector for Research and International Relations, Associate Professor, Corresponding Member of the International Academy of Informatization (IAIN), West Kazakhstan Innovative and Technological University, Uralsk, N. Nazarbayev Avenue, 208, Republic of Kazakhstan, 090000 tel.: 8 (7112) 51-12-33.

            Edige G Nasambayev, Dr. Sci. (Agriculture), Professor of the West Kazakhstan Innovative and Technological University, Uralsk, N. Nazarbayev Avenue, 208, Republic of Kazakhstan, 090000, tel.: 8 (7112) 51-12-33.

            Aidana О Doszhanova, doctoral student of the West Kazakhstan Innovative and Technological University, Uralsk, N. Nazarbayev Avenue, 208, Republic of Kazakhstan, 090000, tel.: 8 (7112) 51-12-33.

            Foat G Kayumov, Dr. Sci. (Agriculture), Professor, Chief Researcher of the Breeding and Genetic Center for Beef Cattle, Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, 29, 9 Yanvarya St., Orenburg, 460000, tel.: 8(3532)30-81-74.

            Ruziya F Tretyakova, Cand. Sci. (Biology), Researcher at the Breeding and Genetic Center for Beef Cattle, Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, 29, 9 Yanvarya St., Orenburg, 460000, tel.: 8(3532)30-81-74.

The article was submitted 05.12.2025; approved after reviewing 04.02.2026; accepted for publication 16.03.2026.

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