Title:	Genetic association between longevity and linear type traits of Holstein cows.
Authors:	KERN, E. L. COBUCI, J. A. COSTA, C. N. MCMANUS, C. M. BRACCINI NETO, J.
Affiliation:	Elisandra Lurdes Kern; Jaime Araujo Cobuci; CLAUDIO NAPOLIS COSTA, CNPGL; Concepta Margaret McManus; José Braccini Neto.
Date Issued:	2015
Citation:	Scientia Agricola, v. 72, n. 3, p.203-209, 2015.
Description:	Longevity is a desirable trait in the dairy industry because of its relationship to profitability. The aim of this study was to estimate genetic parameters for longevity measurements related to productive life, or life in the herd, and linear type traits of Brazilian Holstein cows born between the years 1990 and 2008. The (co) variance components were estimated by the restricted maximum likelihood method. The heritability for measurements of longevity and linear type traits ranged from 0.05 to 0.07 and 0.08 to 0.39, respectively. The genetic correlations between measurements of longevity and linear type traits ranged from -0.39 to 0.31. Direct selection for longevity does not necessarily lead to long-lived cows, due to low heritability. Indirect genetic selection for udder depth, bone quality, udder height, rear teat placement and conformation traits showed the highest genetic correlations with measurements of time between birth and last milk record and time from first calving to last milk record.
NAL Thesaurus:	genetic correlation
Keywords:	Mammary system Productive life Rear teat placement
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGL)