BIOLOGIA |
Mejoramiento Genético de Animales
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In the present paper a broad view of
animal breeding is given, and some of its problems and prospective in 1998
are described. Issues related with the definition of breeding objectives,
genetic evaluation, methods to utilize different types of gene action,
optimization of breeding programs and use of new technologies are discussed.
It is concluded that evaluation of animals on the basis of measurements
(phenotype) and pedigree for calculating estimated breeding values (EBVs)
would remain as the basis for genetic improvement of animals. Improvements
in the methods to obtain economic weights for different traits for selection
and to maximize the response to breeding programs restricting inbreeding
and costs with new optimization and analysis tools for non-linear complex
problems such as the genetic algorithms and artificial intelligence are
expected. Other improvements are the generalization of methods for genetic
evaluation of populations consisting of different breeds and crosses and
the development of methods to incorporate genomic information (DNA molecular
markers), and the use of new reproductive techniques based on the manipulation
of reproductive physiology of animals, gametes and embryos in the design
of more efficient animal breeding programs. New advances in reproductive
and molecular technology could help in the improvement of the analysis
and use of interactions among genes and between genes and the environment.