Genetic trends and trade-offs between growth and reproductive traits in a Nellore herd.

ABSTRACT: The knowledge of genetic trends and trade-offs between growth and reproductive traits might be useful to understand the evolution of these traits in livestock and natural populations of animals. We estimated the genetic trends and trade-offs between pre-weaning growth and calving intervals of Nellore animals from a commercial farm. Two-trait animal models were used to estimate covariance components and breeding values (EBV) for direct and maternal genetic effects of pre-weaning growth and direct genetic effects of calving intervals. Regression analyses were performed to examine the relationship between direct and maternal EBV of pre-weaning growth and direct EBV of calving intervals (dependent variables) and the coefficient of generation of each animal (independent variable). We also perfo

SUBMITTER: Abreu LRA 

PROVIDER: S-EPMC6095503 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature