Utilização de dados parciais na seleção de codornasde corte para produção de ovos

Abstract

The objective of this work was to verify the possibility of using partial data in the selection of meat-type quail for egg production. The gennetc groups UFV1 and UFV2 of meat-type quails, which are from different origins were evaluated. Information from 1,632 mothers, of which 816 from UFV1 and 816 from UFV2 gennetc group, was used. The gennetc parameters were obtained at the partial periods from the 6th to 24th (P24), 32th (P32), 40th (P40) and 48th (P48) weeks, and at the total period of egg production (P52), from the 6th to 52th week. The components of variance and covariance and the gennetc parameters were estimated by restricted maximum likelihood, using a univariate animal model. The partial and total production of eggs were estimated by the multivariate animal model through the Wombat application. For UFV1, the heritability values were: 0.09, P24; 0.09, P35; 0.09, P40; 0.08, P48; and 0.07 for P52; and the gennetc correlations ranged from 0.79 to 0.99. For UFV2, the heritability values were: 0.09 for P24; 0.09, P24; 0.10, P40; 0.11, P48; and 0.13 for P52; and correlations ranged from 0.70 to 0.99. For UFV1 selection, it is recommended to consider egg production up to 40 weeks, and for UFV2 selection, egg production until the 48th week. The low heritability estimates suggest that management changes should be done in order to control environmental effects.