Effect of selection for productive traits in broiler maternal lines on embryo development



Título del documento: Effect of selection for productive traits in broiler maternal lines on embryo development
Revista: Revista brasileira de ciencia avicola
Base de datos: PERIÓDICA
Número de sistema: 000279212
ISSN: 1516-635X
Autors: 1
1

Institucions: 1Empresa Brasileira de Pesquisa Agropecuaria, Centro Nacional de Pesquisa de Suinos e Aves, Concordia, Santa Catarina. Brasil
Any:
Període: May-Ago
Volum: 5
Número: 2
Paginació: 125-129
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés This study used 300 females and 30 males with 36 weeks of age from the selected PP and control PPc maternal broiler lines. PP has been selected for heavy body weight (PC) and high egg production for eight generations. Fertile eggs were collected and weighed individually for 4 periods of 5 consecutive days at two-week intervals. In each period, a total of 960 eggs/line were identified and separated in groups of 240 eggs, and stored for later incubation. Embryo weight (PE) was evaluated at 9 (P9), 11 (P11), 13 (P13), 15 (P15), 17 (P17) and 21 (P21) days of incubation. The objective was to estimate the effect of selection on embryo development. Egg weight (PO) was similar between the two lines. The differences in PE were significant from P15 on, resulting in 1.9g of difference in the chick weight, indicating correlated genetic changes in the embryo development, which can be credited to the selection for PC. Changes in PE while PO was kept unaltered modified the correlations between these two traits. Differences were significant from P13 on and estimated correlations for P21 were 0.72 and 0.70 for PP and PPc, respectively. Chick weight corresponded to 70.91% (PP) and 68.48% (PPc) of egg weight. The estimated increase in P21 that resulted from the increase of 1.0g in PO was 0.71 in PP and 0.68g in PPc
Disciplines Medicina veterinaria y zootecnia
Paraules clau: Aves de corral,
Zootecnia,
Pollos de engorda,
Mejoramiento genético,
Embriones,
Peso,
Rendimiento
Keyword: Veterinary medicine and animal husbandry,
Animal husbandry,
Poultry,
Broilers,
Genetic improvement,
Embryos,
Weight,
Yield
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