Desempenho e predição de híbridos e análise de agrupamento de características de matrizes de frangos de corte
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Revista Brasileira de Zootecnia
Abstract
Este trabalho foi conduzido com cruzamentos (dialelo parcial) entre as linhas do grupo I (LL, TL, ZL, TT, LT, ZT, ZZ, LZ e TZ) e as linhas do grupo II (PP, KP, VP, KK, PK, VK, VV, PV e KV), além de duas linhas (LLc e PPc) controle. O delineamento experimental foi em blocos casualizados consistindo de três blocos, 82 cruzamentos e nove fêmeas por cruzamento. As características de produção, no total de onze, foram: fertilidade na 32a, 38a, 42a e 49a semanas, eclodibilidade na 32a semana, peso inicial dos pintinhos, peso no 42o dia, conversão no 42o dia, rendimento de carcaça, peito e gordura abdominal no 42o dia de idade dos frangos. As médias e predição dos híbridos mostraram ser fonte importante de informações para o melhorista. Existe similaridade entre os cruzamentos oriundos da utilização da linha 1, como progenitor.
This study was conducted using data from single crosses (partial diallel) of male lines, group I (LL, TL, ZL, TT, LT, ZT, ZZ, LZ, TL), female lines, group II (PP, KP, VP, KK, PK, VK, VV, PV, KV), besides two control lines (LLc and PPc). A completely randomized block design, with three replicales, 82 single crosses treatments with nine females for experimental unit was used in the analyses. The production traits analyzed, eleven total, were: fertility at 32nd, 38th, 42nd and 49th weeks of age, hatchability at 32nd, body weight at day of age, body weight and feed:gain ratio at 42nd days of age, and carcass yield, breast yield and fast pad yield at 42nd day of age. The averages and prediction of the hybrid ones showed to be important source of information. Similarity exists among the crossings originating from of the use of the line 1, as progenitor.
This study was conducted using data from single crosses (partial diallel) of male lines, group I (LL, TL, ZL, TT, LT, ZT, ZZ, LZ, TL), female lines, group II (PP, KP, VP, KK, PK, VK, VV, PV, KV), besides two control lines (LLc and PPc). A completely randomized block design, with three replicales, 82 single crosses treatments with nine females for experimental unit was used in the analyses. The production traits analyzed, eleven total, were: fertility at 32nd, 38th, 42nd and 49th weeks of age, hatchability at 32nd, body weight at day of age, body weight and feed:gain ratio at 42nd days of age, and carcass yield, breast yield and fast pad yield at 42nd day of age. The averages and prediction of the hybrid ones showed to be important source of information. Similarity exists among the crossings originating from of the use of the line 1, as progenitor.
