selection programs, indigenous breeds, constrains to genetic progress.
Summary:
This invited contribution summarizes the most important characteristics of selection programs being
applied to Spanish indigenous breeds. Population and traits being recorded, selection objectives and
criteria, breeding values estimation, managing aspects, diffusion to and use of genetic information
by breeders and constraints to genetic progress are synthetically described for each breed. The oldest
programs started at the beginning of the eighties of the last century. Most of them began at the end
of the eighties or in the nineties and a few were initiated within present decade. Due to these age
differences, and to other structural and managing factors, their developmental and effectiveness
levels are very variable. Small number of animals being registered and, therefore, selected, low
number of dams inseminated an its consequence on the capacity to sire testing and on the reliability
of estimated breeding values, the scanty use that some of the breeders make of the genetic
evaluations and the low participation of farmers in the programs, are among the most important
factors limiting their development and their effectiveness in terms of genetic progress obtained.
Esta web usa cookies para ofrecer sus servicios. Al seguir navegando en la web acepta el uso que se hace de las cookies. Pulse aceptar para dejar de ver el mensaje. Más información sobre Cookies