Data/hora: 07/06/2024 06:29:05

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 26/11/2014
Data da última atualização: | 05/02/2024
Autoria: | KERN, E. L.; COBUCI, J. A.; COSTA, C. N.; PIMENTEL, C. M. McM.
Afiliação: | ELISANDRA LURDES KERN; JAIME ARAÚJO COBUCI; CLAUDIO NAPOLIS COSTA, CNPGL; CONCEPTA MARGARET MCMANUS PIMENTEL, UNB; INCT-Pecuária, Belo Horizonte, MG.
Título: | Factor analysis of linear type traits and their relation with longevity in brazilian Holstein cattle.
Ano de publicação: | 2014
Fonte/Imprenta: | Asian-Australas Journal of Animal Science, v. 27, n. 6, p. 784-790, 2014.
Idioma: | Inglês
Conteúdo: | In this study we aimed to evaluate the reduction in dimensionality of 20 linear type traits and more final score in 14,943 Holstein cows in Brazil using factor analysis, and indicate their relationship with longevity and 305 d first lactation milk production. Low partial correlations (−0.19 to 0.38), the medium to high Kaiser sampling mean (0.79) and the significance of the Bartlett sphericity test (p<0.001), indicated correlations between type traits and the suitability of these data for a factor analysis, after the elimination of seven traits. Two factors had autovalues greater than one. The first included width and height of posterior udder, udder texture, udder cleft, loin strength, bone quality and final score. The second included stature, top line, chest width, body depth, fore udder attachment, angularity and final score. The linear regression of the factors on several measures of longevity and 305 d milk production showed that selection considering only the first factor should lead to improvements in longevity and 305 milk production.
Palavras-Chave: | Autovalues; Final Score; Linear Regression.
Thesaurus Nal: | Holstein; longevity; milk production.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (21538-1) - UPC - AP - DD -  -  -  - DIS