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Herdabilidade e correlação genética entre perímetro escrotal, libido e características seminais de touros Nelore

Authors: Sarreiro, L.C.; Bergmann, J.A.G.; Quirino, C.R.; Pineda, N.R.; Ferreira, V.C.P.; Silva, M.A.;

Herdabilidade e correlação genética entre perímetro escrotal, libido e características seminais de touros Nelore

Abstract

Dados de 273 touros Nelore nascidos de 1992 a 1998 e com idade média de 31 meses foram utilizados para estimar as herdabilidades do perímetro escrotal (PE), libido (Lib), motilidade (mot), vigor (vig), concentração (con) e taxa de anormalidade seminal (ta) e as correlações genéticas entre essas características. Com o uso do método da máxima verosimilhança restrita as estimativas de herdabilidade e respectivos erros-padrão foram 0,38±0,20 para PE, 0,33±0,20 e 0,31±0,20 para Lib com idade ou peso corporal no modelo, respectivamente, 0,01±0,10 para mot, 0,03±0,30 para vig, 0,00±0,50 para coN e 0,07±0,13 para ta. As correlações genéticas entre PE e Lib foram 0,78 e 0,76, respectivamente, considerando-se ou não o peso corporal no modelo. Correlações genéticas entre PE e as características con, mot, vig e ta foram 0,99, 1,00, -0,14 e 0,99, respectivamente. Pode-se esperar resposta à seleção direta para PE e Lib e a seleção para uma das características resultaria em seleção para a outra. As baixas estimativas de herdabilidade para as características seminais indicam pequeno componente genético aditivo.

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Keywords

Nelore, Beef cattle, parâmetros genéticos, Bovinos de corte, reprodução, SF1-1100, Animal culture, reproduction, Nellore, genetic parameters

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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!
13
Average
Top 10%
Average
Green
gold