Inbreeding of Canadian Holstein Cattle

Production traits of Holstein cattle: estimation of nonadditive genetic variance components and inbreeding depression.

Additive, dominance, and additive by additive components of genetic variance and inbreeding depression were estimated for production traits from a group of daughters of young sires from the Canadian Holstein population. First lactations of 92,838 cows were analyzed. Three sire and dam models (additive, additive plus dominance, additive plus dominance plus additive by additive genetic effects), ...

Genetic base and inbreeding of Canadienne, Brown Swiss, Holstein and Jersey cattle in Canada

Inbreeding in Dairy Cattle

Inbreeding is defined as half of the genetic relationship between an animal’s parents. For example, the offspring from a mating of animals A and B, which have the same father, will have 12.5 percent inbreeding, because the genetic relationship between A and B is 25 percent. Statistical methods to select the best sires of each generation have been developed, making it feasible to achieve any pos...

Inbreeding in Cattle

Genetic and Phenotypic Effects Inbreeding can have dramatic effects on a herd. These effects are the result of individuals receiving identical genes from each parent. If the parents are related, it is more likely that they have genes that are identical. An individual receiving identical genes from each parent is said to be homozygous for that pair of genes. This would be desirable if the gene t...

pedigree structure of some herds of iranian holstein cattle and their impacts on inbreeding

pedigree information of iranian holstein dairy cattle, collected via animal breeding centre of iran from 1971 to 2007, were utilized to describe the reasons for the increasing inbreed coefficient. inbreeding coefficient (f) and pedigree completeness (pci) of all the available cattle were found out using a pedigree structure of 883713 animals. the herds with pci of above 0.85 were picked out and...