EVOLUTION OF MORPHOMETRIC MEASURES IN THE MANGALARGA MARCHADOR BREED

Authors

  • Juliano Martins Santiago Department of Animal Sciences, Veterinary School of the Federal University of Minas Gerais, Belo Horizonte, MG
  • Adalgiza Souza Carneiro de Rezende Department of Animal Sciences, Veterinary School of the Federal University of Minas Gerais, Belo Horizonte, MG
  • Ângela Maria Quintão Lana Department of Animal Sciences, Veterinary School of the Federal University of Minas Gerais, Belo Horizonte, MG
  • Mayara Gonçalves Fonseca Department of Animal Sciences, Veterinary School of the Federal University of Minas Gerais, Belo Horizonte, MG
  • Jéssica Lage Department of Animal Sciences, Veterinary School of the Federal University of Minas Gerais, Belo Horizonte, MG

DOI:

https://doi.org/10.1590/1983-21252016v29n122rc

Keywords:

Height. Length. Horses. Width. Circumference.

Abstract

The Mangalarga Marchador breed accounts for the largest horse herd in Brazil and has been experiencing national and international expansion. Nevertheless, there is little scientific production on the evolution of this breed and there are no studies on the morphometric transformations that took place during its formation. In this context, the present study aimed to assess the evolution in morphometric measures of the Mangalarga Marchador breed between 1970 and 2010. The research used information archived at the Brazilian Association of Mangalarga Marchador Breeders from 23,148 males and 92,980 females in a completely randomized experimental design. The six treatments consisted of the animals measured between 1970 and 1979, 1980 and 1989, 1990 and 1994, 1995 and 1999, 2000 and 2004, and 2005 and 2010, respectively. The measures assessed were: height at withers and croup, length of the head, neck, back, croup, shoulder, and body, width of the head and croup, thoracic circumference, and cannon circumference Over the period analyzed, males and females experienced a reduction in thoracic circumference, in the lengths of the head, back, croup, and shoulder, and in the widths of the head and croup. In the males, neck length and cannon circumference also decreased, while body length increased in females. Over time, breed selection led to smaller head, higher stature, and shorter trunk length. However, important measures for the breed’s functionality, such as shoulder length and thoracic circumference, decreased.

Author Biographies

  • Juliano Martins Santiago, Department of Animal Sciences, Veterinary School of the Federal University of Minas Gerais, Belo Horizonte, MG
    Departamento de Zootecnia, área de produção e manejo de equídeos
  • Adalgiza Souza Carneiro de Rezende, Department of Animal Sciences, Veterinary School of the Federal University of Minas Gerais, Belo Horizonte, MG
    Escola de Veterinária, Departamento de Zootecnia
  • Ângela Maria Quintão Lana, Department of Animal Sciences, Veterinary School of the Federal University of Minas Gerais, Belo Horizonte, MG
    Escola de Veterinária, Departamento de Zootecnia
  • Mayara Gonçalves Fonseca, Department of Animal Sciences, Veterinary School of the Federal University of Minas Gerais, Belo Horizonte, MG
    Escola de Veterinária, Departamento de Zootecnia
  • Jéssica Lage, Department of Animal Sciences, Veterinary School of the Federal University of Minas Gerais, Belo Horizonte, MG
    Escola de Veterinária, Departamento de Zootecnia

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Published

12-03-2016

Issue

Section

Zootechnics