TY  - JOUR
AU  - A., Kolosov Yuri 
AU  - I., Klimenko Aleksander 
AU  - N., Vasilenko Vyacheslav 
AU  - V., Shirokova Nadezhda 
AU  - V., Getmantseva Lyubov 
AU  - Yu, Kolosov Anatoli 
AU  - V., Aboneev Vasili 
AU  - N., Chizhova Ludmila 
AU  - V., Marchenko Vyacheslav 
AU  - K., Mikhailenko Antonina 
AU  - V., Aboneev Dmitri 
PY  - 2017
TI  - Some Biological Characteristics and Prediction of Sheep Productivity at Different Variants of Breed Selection
JF  - OnLine Journal of Biological Sciences
VL  - 17
IS  - 4
DO  - 10.3844/ojbsci.2017.343.347
UR  - https://thescipub.com/abstract/ojbsci.2017.343.347
AB  - The paper presents the findings on the morpho structural diversity of sheep placenta, depending on such factors as age, exterior and physique characteristics, breeds, ewes prolificacy that are fundamental in assessing progeny viability. The experiment involved the ewes of the Caucasian and North Caucasian meet-and-wool breeds inseminated by the rams of the same breeds as well as the Texel, Poll Dorset, Edilbay and their progeny. The biomaterial for the research was the placenta and blood of the experimental animals. Ewes aged 2.5 and 3.5 years had the lightest placenta – 165 and 172 gr, ewes aged 4.5 and 5.5 years had the heaviest placenta – 230 and 247 gr. It has been also determined that the most favourable age for gestation in ewes is 4.5-5.5 years. Interrelation of the placenta morphostructural parameters (placenta weight, the number and size of cotyledons) and the lambs live weight and productivity has been established. This allows us to view placenta as a bioscopic material for assessing and prediction of future sheep productivity at early age.