BREEDING METHODS IN LIVESTOCK IMPROVEMENT

Livestock Breeding at the Crossroads

IN THE belief that the time is ripe for a thorough reexamination of present methods and results in livestock breeding, this introductory article endeavors to present a summary of the general situation. Even though they are presented with a due realization of their tentative nature, some of the conclusions will be considered debatable. It is hoped, however, that they will arouse active and thoug...

Evolution of Livestock Improvement

Since the first domestication of livestock, people have been attempting to alter specific traits in animals that we deem to be desirable for various reasons. In doing, so we have been indirectly altering the genetic makeup of these species by selecting and breeding animals with specific traits, and therefore, particular genetic make-ups related to these traits. This initial form of genetic impr...

Genetic Engineering of Livestock Improvement

Congress of Genetics Applied to Livestock Production Single Step Methods with a View towards Poultry Breeding

Single Step methods combine pedigree relationships and marker genotypes in a single conceptual and streamlined framework based on extending animal model BLUP to include marker genotypes. The extension can be done because genotypes at markers follow covariances described by the pedigree. This results in a relationship matrix that combines pedigree and markers, called H. Fitting H in Henderson’s ...

Methods of Embryo Sexing in Cattle Breeding: A Review

Different livestock sectors as beef industries get benefit from the production of male animals while dairy industries get benefit from the milk production by the female animals. Therefore, it is obvious need to produce the animals of desired sex which can be achieved by predetermining the sex of conceptus at the time of conception i.e. pre determination of sex may be of great economic importanc...