Analysis of the influence of genetic and non-genetic factors on the birth weight and weaning weight of lambs
| Autor: | S.I. Lugovoy, S. S. Kramarenko, A. S. Kramarenko, O.I. Yulevich |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Litter (animal)
lcsh:Veterinary medicine 040301 veterinary sciences Birth weight Domestic sheep reproduction 0402 animal and dairy science 04 agricultural and veterinary sciences Biology Animal husbandry 040201 dairy & animal science 0403 veterinary science Animal science Weaning lcsh:SF600-1100 birth and weaning weight of lambs ram genotype year of lambing age of the ewes litter size (type of birth) sex of lamb sex ratio in twins the ascanian fine-fleece breed Analysis of variance Weaning weight Sex ratio |
| Zdroj: | Науковий вісник Львівського національного університету ветеринарної медицини та біотехнологій імені С.З. Гжицького. Серія: Сільськогосподарські науки, Vol 22, Iss 93, Pp 14-21 (2020) |
| ISSN: | 2707-5834 2519-2698 |
| Popis: | The main aim of this paper is to analyze the influence of genetic and non-genetic factors on the birth weight and weaning weight of lambs. The study was carried out on the basis of the Institute of Animal Husbandry of Steppe Regions named by M. F. Ivanov “Askania-Nova” – the National Scientific Agricultural Center in Sheep Breeding of NAAS. Birth and weaning weights data collected during a 5-vear period from 3961 lambs were used. The reproductive traits of the Ascanian fine-fleece (AC) ewes were evaluated in combination with the rams of different genotypes: Ascanian fine-fleece, Australian merino (AM) and half-bred animals (1/2AC+1/2AM). The main effect of the ram genotype and the year of lambing, the age of the ewes, the litter size, the sex of lamb and the sex ratio in twins on the birth weight and weaning weight of lambs was analysed using one-way ANOVA. Differences between years of the 5-year period were highly significantly (P < 0.001) for all lamb traits studied. The effects of the environmental factor (year of lambing) on the birth weight and weaning weight of lambs represented 27.2 and 15.2 per cent of the total variance, respectively. The ram-group effects, which are mainly genetic differences, were highly significant (P |
| Databáze: | OpenAIRE |
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