2000
DOI: 10.1590/s1516-35982000000600007
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Influência da interação touro x rebanho na estimação da correlação entre efeitos genéticos direto e materno em bovinos da raça Nelore

Abstract: RESUMO -A interação touro x rebanho foi avaliada em uma população com 30.789 registros de animais da raça Nelore nascidos entre 1984 e 1994 em doze fazendas localizadas em três Estados do Sudeste e Centro-Oeste brasileiro, com um total de 48.495 animais no pedigree. As características consideradas foram os pesos ao nascer (PESNAS) e à desmama (PESDES) e o ganho de peso da desmama ao sobreano (GP345). O efeito da interação touro x rebanho foi considerado aleatório em modelos animais uni e bicaraterística, usand… Show more

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Cited by 39 publications
(40 citation statements)
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References 23 publications
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“…This value is close to those estimated by ELER et al (2000), FERREIRA et al (2001) andTORAL et al (2004), ranging from 0.16 to 0.59; however it is superior to those related for the Nellore breed by RIBEIRO et al (2001) andSILVEIRA et al (2004), respectively 0.16 and 0.17, suggesting that, in these two populations, environmental infl uence had a stronger effect on the animals' performance; or yet that the biggest number of collected observations from a big number of farms with heterogeneous management could have maximized the environmental variance, underestimating the heritability estimative.…”
Section: Resultssupporting
confidence: 91%
See 1 more Smart Citation
“…This value is close to those estimated by ELER et al (2000), FERREIRA et al (2001) andTORAL et al (2004), ranging from 0.16 to 0.59; however it is superior to those related for the Nellore breed by RIBEIRO et al (2001) andSILVEIRA et al (2004), respectively 0.16 and 0.17, suggesting that, in these two populations, environmental infl uence had a stronger effect on the animals' performance; or yet that the biggest number of collected observations from a big number of farms with heterogeneous management could have maximized the environmental variance, underestimating the heritability estimative.…”
Section: Resultssupporting
confidence: 91%
“…The maternal heritability estimated for P205 was 0.20±0.03, a higher value than those estimated by ELER et al (2000), FERREIRA et al (2001), RIBEIRO et al (2001) andSILVEIRA et al (2004) which range from 0.06 to 0.16. This suggests a higher infl uence of maternal heritability on the progenies performance in the studied population.…”
Section: Resultscontrasting
confidence: 50%
“…Para Robinson (1996), as estimativas negativas são provavelmente conseqüência de uma variação adicional entre touros, ou variação reprodutor x ano, do que evidências de um relacionamento genético negativo verdadeiro. Eler et al (2000) verificaram que as correlações passaram de negativas para próximas de zero e positivas quando se considerou, no modelo, o efeito da interação reprodutor x rebanho. No caso de ovinos de corte, os resultados observados são de certo modo contraditórios.…”
Section: Resultsunclassified
“…However, in Brazil and Uruguay, genotype × environment interaction was observed for growth traits (Mattos et al, 1997;Cardellino et al, 1997;Souza et al, 1998;Eler et al, 2000;Mercadante et al, 2000;Alencar et al, 2005;Mascioli et al, 2006). Studies comparing populations bred in temperate, subtropical and tropical regions are not common in the literature.…”
Section: Introductionmentioning
confidence: 99%