Avaliação de diferentes linhagens de poedeiras leves criadas no sistema convencional

Abstract

With the aim of evaluating the performance, internal and external quality of eggs from different lines of commercial layers (Hy Line W80®, H&N Nick Chick®, Hy Line W36®, Lohmann-NA®, Hisex White®, Lohmann-Lite®, Dekalb White® and Bovans White®) during the breeding, rearing and peak production phase, a literature review was carried out on how the panorama of laying poultry farming is, what has been sought with genetic improvement in lineages, the peculiarities of the commercial laying hen lines under study, brief characterization of the conventional system, aspects of greatest relevance within the question of egg quality and within the different lines, the main factors that affect egg quality. As a result, three field experiments were developed with commercial layers of different strains in three breeding phases, namely, breeding, rearing and peak production. In this context, the aim of this dissertation is to present to the community the main results and discussions generated in these studies. It is expected, therefore, to contribute to the dissemination of knowledge that is still little explored in the poultry chain, helping producers and technicians in choosing the lines created in the conventional system that best express their genetic potential, that is, lines with good performance and that minimize costs. production, producing a quality egg for the final consumer. It is concluded that the strains presented different performance, egg and shell quality, showing that each strain has a different genetic potential for each variable studied.