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Parâmetros genéticos para características de prolificidade nas raças Landrace e Large White

Authors: Anrain, M.; Bergmann, J.A.G.; Irgang, R.; Valente, B.D.;

Parâmetros genéticos para características de prolificidade nas raças Landrace e Large White

Abstract

Dados de suínos das raças Landrace (LD) e Large White (LW) foram utilizados para estimar componentes de variância para número total de leitões nascidos (NTN), nascidos vivos (NV) e de leitões vivos ao quinto dia (LV5). Usou-se o método da máxima verossimilhança restrita (REML) para estimar componentes de variância. O modelo misto incluiu os efeitos fixos de mês e ano de nascimento e da inseminação da porca e ordem de parto. Análises unicaracterísticas incluíram os efeitos genético direto, genético materno e de ambiente permanente. Análises multicaracterísticas foram feitas para estimar correlações genéticas. Os modelos unicaracterísticas foram comparados e o que continha apenas o efeito genético direto foi considerado o mais adequado. As estimativas de herdabilidade para NTN foram de 0,15 para LW e de 0,08 a 0,12 para LD, dependendo do modelo, para NV foram de 0,14 para LW e de 0,05 a 0,12 para LD, e para LV5, variaram de 0,11 a 0,12 para LW e de 0,03 a 0,08 para LD. As correlações fenotípicas e genéticas entre as três características foram altas e favoráveis. Conclui-se que a seleção para aumento do LV5 pode ser uma via interessante para o aumento do tamanho da leitegada, da sobrevivência de leitões e da habilidade materna em suínos.

Keywords

herdabilidade, resposta à seleção, prolificidade, heritability, litter size, SF1-1100, selection response, Animal culture

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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Average
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