Genetic, phenotypic and environmental trends for D160 and D240 in Nellore cattle in the State of Bahia

Authors

  • Fábio Gusmão UESB-BA
  • Carlos Malhado UESB-BA
  • Paulo Carneiro UESB-BA
  • Raimundo Filho Universidade para o Desenvolvimento do Estado e da Região do Pantanal

Keywords:

Bovine genetics. Genetic parameters. Heritability.

Abstract

This work aimed to estimate the genetic (maternal and direct effects), phenotypic and environmental parameters and trends of the following features; time to reach 160 kg (D160) in the pre-weaning period and time to reach 240 kg (D240) in the post-weaning period for Nellore cattle born between 1980 and 2001 in the state of Bahia (Brazil). The software MTDFREML was used to estimate the genetic parameters and predict the genetic values. The trends were estimated through regression by weighed mean of the dependent variables over the birth year. On direct and maternal heritabilities for D160, respectively, were 0.13 ± 0.02 and 0.07 ± 0.02. The genetic and maternal trends from both maternal and direct effects were non significant, indicating a lack of selection for growth rate traits over years. However, phenotypic progress was evidenced during this period, indicating that producers have been improving animal’s raising conditions.

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Published

2009-05-28

Issue

Vol. 40 No. 2 (2009)

Section

Animal Science

License

Atribuição
CC BY

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How to Cite

GUSMÃO, Fábio; MALHADO, Carlos; CARNEIRO, Paulo; FILHO, Raimundo. Genetic, phenotypic and environmental trends for D160 and D240 in Nellore cattle in the State of Bahia. Revista Ciência Agronômica, [S. l.], v. 40, n. 2, 2009. Disponível em: https://periodicos.ufc.br/revistacienciaagronomica/article/view/83934. Acesso em: 6 apr. 2026.