The evolution of the genetic improvement methodology in the beef cattle has been based, as in other species, in our capacity to detect the best genotypes for using as reproducers. In this paper are described three phases ...

In Retinto Beef cattle breeding, a series of farms have stood out as leaders in animal production in the supply of sires to other farms. In this paper we have made an analysis of these outstanding farms in order to study ...

In the last decades, we have witnessed a growing calculation power of computers and a dramatic cheapening of these. This has permitted development of mathematical models for problem resolution in increasingly complex animal ...

Within the improvement plan, inbreeding crosses may prove to be a tool that the Retinto cattle breeder might use along with selection to increase the genetic merits of his breed. The majority of breeders know the effects ...