Genetic group and heterosis on morphometric measurements during the growth of male beef cattle

Ricardo Zambarda Vaz, João Restle, Paulo Santana Pacheco, Fabiano Nunes Vaz, Luiz Danilo Muehlmann, Dari Celestino Alves Filho, Régis Luis Missio, Marcia Bitencourt Vaz

Abstract


In the present study, the effects of genetic group and heterosis on body measurements of purebreds (Charolais - C and Nellore - N), first-generation crossbreds (G1) (1/2C1/2N and 1/2N1/2C), and second-generation crossbreds (G2) (3/4C1/4N and 3/4N1/4C) males from rotational crossbreeding were evaluated at 8, 12, 18, and 24 months of age. Among the purebreds, the Nellore displayed greater rump height than the Charolais. The Charolais had greater thoracic perimeter than the Nellore, however this difference decreased gradually with advancing age, being equal between the two genetic groups at 24 months. For width of the rump, ischial opening and thoracic perimeter crossbred animals showed higher values than the purebred animals at all ages, but less pronounced at eight months of age. For all morphometric measurements, with exception of rump height, the differences of crossbreds males in relation to the purebreds, were more evident in relation to the Nellore. Heterosis was significant for morphometric measurements in male beef cattle. Morphometric measurements showed high correlation with each other and with body weight, thereby indicating that they are good indicators of body development.

Keywords


Bos taurus Taurus; Bos taurus indicus; Charolais; Crosbreeding; Morphometric measurements; Nellore.

Full Text:

PDF


DOI: http://dx.doi.org/10.5433/1679-0359.2016v37n4Supl1p2759

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433 / 1679-0359
E-mail:  semina.agrarias@uel.br
Este obra está licenciado com uma Licença  Creative Commons Atribuição-NãoComercial 4.0 Internacional