Agrarian
Bulletin
of the Urals

Russian Journal of Agricultural Research

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for Affairs of the Press, Television and Radio Broadcasting and Mass Communication Media.
Registration certificate: PI number 77-12831 on May 31, 2002
Subscription index in catalog «Russian Press» - 16356
ISSN 1997 - 4868 (Print)

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Journal is included in the list of VAK (from 25.09.2017), No. 291

ISSN 2307-0005 (Online)
Key title: Agrarnyj vestnik Urala (Online)
Abbreviated key title: Agrar. vestn. Urala (Online)

Аграрный вестник Урала № 05 (147) 2016

Животноводство

Любимов А. И. доктор сельскохозяйственных наук, профессор, ректор Ижевская государственная сельскохозяйственная академия

Юдин В. М. кандидат сельскохозяйственных наук, доцент Ижевская государственная сельскохозяйственная академия

Никитин К. П. аспирант Ижевская государственная сельскохозяйственная академия

УДК:636.237.21.082.252

EFFECT OF DIFFERENT TYPES OF INBREEDING ON DAIRY PRODUCTS EFFICIENCY AND REPRODUCTIVE QUALITIES OF COWS OF BLACK-MOTLEY BREED

 Inbreeding – one of the selection methods of breeding cattle, in which the paired knocked related animals in order to consolidate and improve the offspring defined-governmental economic-useful signs, which is achieved due to an increase in the get-direct offspring of homozygosity, and consolidate the genotype of parental pairs, have high efficiency indicators. A comparative analysis of productivity of an outbred and an inbred animal indicates the need to explore all nuances related selection, as inbred animals often exceed their peers in productivity, despite described in the scientific works the fears of scientists in the development of inbred depression, which is manifested in decreased viability and productivity of animals received during the related selection. The studies were conducted in a herd of pedigree factory farm «Kolos» Vavozhsky district of Udmurt Republic on the basis of the analysis of the pedigrees of animals for breeding cards form 2-MOL animal husbandry and breeding  data records. The degree of inbreeding was determined by the conventional method of Push – Shaporuzh and coefficient of inbreeding of Right – Kislovsky. Check-degenerate studies found that cows obtained with the use of related selection have a higher milk yield compared to outbred half-sister (by 230.4 kg). The highest yield of the complex obtained by inbreeding compared with animals obtained by selecting a simple and complex, respectively, 228.4 kg (3.9 %) and 80.4 kg (1.4 %). The worst rate service period depending on the degree of kinship-pairing observed in animals with a moderate degree of inbreeding – 133.2 days, which is worst then index in outbred animals group for 24.7 days (18.5 %).


Keywords:

inbreeding, outbreeding, breeding selection, Push – Shaporuzh, Right – Kislovskiy, exponent of inbreeding, coefficient of inbreeding, homozygosity, breed, population, panmixia.


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