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Seroprevalence of Toxoplasma gondii infection in domestic pigs reared under different management systems in Zimbabwe
Hove, T.(Zimbabwe Univ., Harare (Zimbabwe). Dept. of Paraclinical Veterinary Studies) | Lind, P. | Mukaratirwa, S.
Создаваемый заводской тип герефордского скота
2010
Linnik, L.M., Vitebsk State Academy of Veterinary Medicine (Belarus)
In the conditions of Vitebsk region of the Republic of Belarus there was realized a programme on creation of breed type of Hereford cattle. In course of the study there were realized experiments on increasing the number of livestock of beef cattle breeding by means of accumulation cross breeding of black-and-white cattle with Hereford producer bulls as well as by means of pedigree breeding of Hereford cows and calves imported from Russia and Hungary for the production of marbled beef. Breeding background of obtained purebred calves was determined by DNA-testing method in accordance with the international standard of certification. Into the breeding group of created meat type of Hereford cattle in the analyzed cattle breeding enterprise there were selected 1183 heads, including 24,2% of purebred animals and 17,2% hybrids of the third and fourth generations. The breeding estimation thoroughbred Hereford cattle showed that all producer bulls belonged to the class elite-record. The percentage of cows and heifers of the elite-record class was 89,3% in the conditions of growing number of a thoroughbred livestock on 98 heads. Purebred young stock in number of 45 heads and their mother passed the estimation of their origin by DNA method-testing.
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