... and Holstein breeds. The purpose was to study the effectiveness of selection for a new breed of dairy cattle. As a result of breeding hybrids of different genotypes it was found that they had an average ...
... of quality research on meat, carcasses and hybrids obtained by using Pietrain breed (white and white with black spots) – paternal form Yorkshire and Landrace maternal form. For this purpose, it was determined ...
... humoral factors among two of the most popular broiler chicken hybrids – Ross and Cobb. Both hybrids show relatively high concentrations of blood serum lysozyme during the first week of life (Ross-7,79 ...