|
|
|
|
| |
|
|
| Almeida,Tatiana Prestes; Kern,Elisandra Lurdes; Daltro,Darlene dos Santos; Braccini Neto,José; McManus,Concepta; Thaler Neto,André; Cobuci,Jaime Araujo. |
| ABSTRACT This study aimed to estimate heritability, genetic, and residual correlations between reproductive traits such as age at first calving, calving interval, dry period, and first service period and linear type traits measured in Holstein cows born between the years 1990 and 2008 in Brazil. The (co)variance components were estimated by restricted maximum likelihood, using the MTDFREML software. The heritability for reproductive traits and linear-type traits ranged from 0.02 to 0.03 and from 0.07 to 0.40, respectively. Estimates of genetic correlations between reproductive and linear-type traits ranged from -0.23 (top line) to 0.28 (angularity) to age at first calving, from -0.54 (final score) to 0.34 (foot angle) to calving interval, from -0.23... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Age at first calving; Dairy cattle; Genetic parameters; Reproductive efficiency. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200091 |
| |
|
| |
|
|
|
