Data/hora: 03/06/2024 04:58:13

Provedor de dados: | 63
País: | Brazil
Título: | Genetic association between longevity and linear type traits of Holstein cows
Autores: | Kern,Elisandra Lurdes; Cobuci,Jaime Araujo; Costa,Cláudio Napolis; McManus,Concepta Margaret; Braccini Neto,José.
Data: | 2015-06-01
Ano: | 2015
Palavras-chave: | Genetic correlation; Mammary system; Productive life; Rear teat placement.
Resumo: | 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000300203
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/0103-9016-2014-0007
Formato: | text/html
Fonte: | Scientia Agricola  v.72 n.3 2015
Fonte: | info:eu-repo/semantics/openAccess