Dysplasia and locomotive organs diseases by dogs

In my bachelor paper, I describe some of the genetically determined diseases of the musculoskeletal system of dogs. These orthopedic diseases include hip and elbow dysplasia, Legg-Calvé-Perthes disease and patellar luxation. They represent a significant risk in breeding practise. They are influenced by genetic and environmental factors (size and body weight, nutrition, etc.). Each of these diseases are painful for dogs. These diseases are inherited polygenic. Expression of the trait is controlled by multiple genes. Heritability coefficient is in the low to medium values, but for hip dysplasia can be up to 0,8. Breeder of affected animals can choose between conservative or surgical treatment. Because these are hereditary diseases, should be given the attention to selective programs.