COMPONENTS OF (CO)VARIANCE FOR AGE AT FIRST AND SECOND CALVING OF NELLORE FEMALES RAISED IN SOUTHERN BRAZIL

Authors

  • Tiago Bresolin Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brasil
  • Dionéia Magda Everling Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul
  • Camila Urbano Braz Universidade Estadual Paulista (UNESP), Jaboticabal, São Paulo, Brasil
  • Fernanda Cristina Breda Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brasil
  • Paulo Roberto Nogara Rorato Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brasil

Keywords:

beef cattle, fertility, Bayesian inference, genetic parameters

Abstract

The objective of this study was to estimate the heritability, genetic correlation and estimated breedingvalues for age at first (AFC) and second calving (ASC) for Nellore females raised in SouthernBrazil. The (co)variance and estimated breeding values were obtained using Bayesian inference ina bivariate analysis, adopting an animal model. The average ages were 49.30 and 69.85 months,and the heritabilities were 0.25 and 0.26, respectively for AFC and ASC. The genetic correlationbetween AFC and ASC was 0.88. The correlation between the classifications of sires according totheir estimated breeding values was 0.93. The heritability estimates for AFC and ASC suggest thepossibility of obtaining genetic gain by selection. The correlation between these traits close to oneindicates that they are virtually controlled by the same genes, and the selection for one of them willpromote correlated advanced gain for the other.

Keywords: Bayesian inference; beef cattle; genetic parameters; fertility.

Downloads

Download data is not yet available.

Downloads

Published

2015-10-30

How to Cite

BRESOLIN, Tiago; EVERLING, Dionéia Magda; BRAZ, Camila Urbano; BREDA, Fernanda Cristina; RORATO, Paulo Roberto Nogara. COMPONENTS OF (CO)VARIANCE FOR AGE AT FIRST AND SECOND CALVING OF NELLORE FEMALES RAISED IN SOUTHERN BRAZIL. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 16, n. 4, p. 474–480, 2015. Disponível em: https://revistas.ufg.br/vet/article/view/28131. Acesso em: 23 dec. 2025.

Issue

Vol. 16 No. 4 (2015)

Section

Animal Production

License

Copyright (c) 2015 Brazilian Animal Science/ Ciência Animal Brasileira

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g. in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).