Multiple-Trait Estimation of Variance Components of Yield and Type Traits Using an Animal Model

Misztal, I.; Lawlor, T.J.; Short, T.H.; VanRaden, P.M.

doi:10.3168/jds.s0022-0302(92)77791-1

Cited by 100 publications

(110 citation statements)

References 15 publications

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“…These values confirm those reported by Misztal et al (1992) and Darili et al (2008) to stature (0.42 and 0.38, respectively) and Rupp & Boichard (1999) to fore teat placement (0.30). Table 2 -Additive genetic covariances (above the diagonal) and residuals (below the diagonal) for 21 type traits and the final score ST -stature; TL -top line; WE -weight; CW -chest width; BD -body depth; LS -loin strength; RA -rump angle; RW -rump width; FA -foot angle; BQ -bone quality; SV -side view of rear legs; FU -fore udder attachment; FT -fore teat placement; TL -teat length; RUH -rear udder height; RUW -rear udder width; RT -rear teat placement; UD -udder depth; UT -udder texture; UC -udder cleft; AN -angularity; FS -final score.…”

Section: Resultssupporting

confidence: 91%

“…Most estimates of heritability were higher than 0.17 ( Figure 1) and resemble the results observed in the literature for Holstein herds in countries like Australia, USA and Canada (Thompson et al, 1983;Misztal et al, 1992;Van Dorp et al, 1998).…”

Section: Resultssupporting

confidence: 85%

“…Since most studies related to type traits in Holstein cows were carried out in countries in North America and Europe (Misztal et al, 1992;Wiggans et al, 2004), the Brazilian herd may have been influenced by the high use of imported semen from these countries.…”

Section: Resultsmentioning

confidence: 99%

“…Examples are high scores for traits related to body size (Misztal, 1992;, especially stature. For many years, it was believed that more productive cows were those of a larger size; however, Berry et al (2005), when evaluating Irish herds, found that this is not strictly true, since smaller cows can produce as efficiently as those of greater size.…”

Section: Resultsmentioning

confidence: 99%

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Genetic parameters for type traits in Holstein cows in Brazil

et al. 2012

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-Data from 26,558 Holstein cows in 802 herds were used to estimate genetic, residual and phenotypic parameters for 22 type traits. The model included the fixed effects of herd-year, period of classification, classifier, stage of lactation and age of cows at calving (covariate) and random genetic and residual effects. Heritability for type traits ranged from 0.10 to 0.39. The genetic variability in these traits suggested the possibility for moderate genetic gains through selection. The phenotypic correlations were moderated, mainly in the section conformation. Genetic correlations between type traits ranged from -0.44 to 0.85. High genetic correlations indicated that breeding programs could be successful without including all type traits. The selection for the final score at the expense of other traits must be performed with restraint, because in the long term, this may promote undesirable changes in some type traits.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Genetic parameters for type traits in Holstein cows in Brazil

et al. 2012

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“…Em geral, a receita será ainda maior se a vaca tiver alta produção de leite nas primeiras lactações e se apresentar funcional por período extenso dentro do rebanho. Porém, a seleção praticada somente para produção de leite pode diminuir o mérito de outras características (Misztal et al, 1992).…”

Section: Introductionunclassified

Correlações genéticas e fenotípicas entre características de tipo e produção de leite em bovinos da raça Holandesa

Esteves¹,

Bergmann²,

Durães

et al. 2004

Arq. Bras. Med. Vet. Zootec.

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RESUMOCorrelações genéticas e fenotípicas entre 21 características lineares de tipo e produção de leite em até 305 dias de lactação foram estimadas pela máxima verossimilhança restrita sob modelo animal, a partir de dados da Associação de Criadores de Gado Holandês de Minas Gerais. Nas análises das características lineares, os efeitos fixos utilizados no modelo incluíram estádio da lactação, idade do animal, grupo contemporâneo de rebanho, ano e estação de classificação, e o efeito aleatório do pai da vaca. As características lineares que apresentaram maiores correlações genéticas com produção de leite foram largura do úbere posterior (0,60) e largura de garupa (0,37), indicando não haver antagonismo genético entre a seleção para essas características e a produção de leite. As correlações fenotípicas entre características lineares de tipo e produção de leite foram, em geral, menores do que as correlações genéticas correspondentes. As correlações fenotípicas entre as características lineares apresentaram-se altas dentro das seções de conformação/capacidade e de sistema mamário. Correlações genéticas entre algumas características lineares foram altas, possibilitando a exclusão de algumas delas do programa de classificação linear adotado para a raça Holandesa no Brasil. Palavras

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Current status of research on linear type traits in Indian cattle and future strategies

Dahiya

Kumar

2020

Trop Anim Health Prod

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Multiple-Trait Estimation of Variance Components of Yield and Type Traits Using an Animal Model

Cited by 100 publications

References 15 publications

Genetic parameters for type traits in Holstein cows in Brazil

Genetic parameters for type traits in Holstein cows in Brazil

Correlações genéticas e fenotípicas entre características de tipo e produção de leite em bovinos da raça Holandesa

Current status of research on linear type traits in Indian cattle and future strategies

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