EN
A rapid improvement of the poultry industry during last thirty years was observed. Using primarily classical approaches, poultry breeders drastically decreased slaughtering age of broilers and achieved a biological limit of egg production. Along with the remarkable genetic progress numerous novel technologies have emerged elsewhere, expanding understanding the molecular structure and function of the DNA and abilities to manipulate it. The new molecular technologies, to enable poultry breeders to analyse the genotype of genetic flock using the DNA markers and developed chicken genomic map, introduce foreign and manipulated genes into the germ line of individual bird, modify the genomic make up expression of specific genes as well as produce valuable recombinant proteins using birds as bio-reactors.