Tropical Animal Health and Production

, Volume 43, Issue 3, pp 623–630

Use of multivariate analyses for determining heat tolerance in Brazilian cattle

  • Concepta McManus
  • Marlos Castanheira
  • Samuel Rezende Paiva
  • Helder Louvandini
  • Maria Clorinda Soares Fioravanti
  • Giane Regina Paludo
  • Eliandra Bianchini
  • Patricia Spoto Corrêa
Original Research

DOI: 10.1007/s11250-010-9742-8

Cite this article as:
McManus, C., Castanheira, M., Paiva, S.R. et al. Trop Anim Health Prod (2011) 43: 623. doi:10.1007/s11250-010-9742-8

Abstract

Adaptability can be evaluated by the ability of an animal to adjust to environmental conditions and is especially important in extreme weather conditions such as that found in tropical Brazil. A multivariate analysis using physical and physiological traits in exotic (Nellore and Holstein) and naturalized (Junqueira, Curraleira, Mocho Nacional, Crioula Lageana, and Pantaneira) cattle breeds was carried out in the Federal District of Brazil to test and determine which traits are important in the adaptation of animal to heat stress as well as the ability of these traits and statistical techniques to separate the breeds studied. Both physical and physiological traits were measured on three occasions and included body measurements, skin and hair thickness, hair number and length, pigmentation, sweat gland area as well as heart and breathing rates, rectal temperature, sweating rate, and blood parameters. The data underwent multivariate statistical analyses, including cluster, discriminate, and canonical procedures. The tree diagram showed clear distances between the groups studied, and canonical analysis was able to separate individuals in groups. Coat traits explained little variation in physiological parameters. The traits which had higher discriminatory power included packed cell volume, shoulder height, mean corpuscular volume, body length, and heart girth. Morphological and physiological traits were able to discriminate between the breeds tested, with blood and size traits being the most important. More than 80% of animals of all breeds were correctly classified in their genetic group.

Keywords

Adaptation Bovidae Naturalized breeds Temperature Thermolysis 

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Concepta McManus
    • 1
  • Marlos Castanheira
    • 2
  • Samuel Rezende Paiva
    • 3
  • Helder Louvandini
    • 1
  • Maria Clorinda Soares Fioravanti
    • 2
  • Giane Regina Paludo
    • 1
  • Eliandra Bianchini
    • 1
  • Patricia Spoto Corrêa
    • 4
  1. 1.Faculdade de Agronomia e Medicina VeterináriaUniversidade de BrasíliaBrasíliaBrazil
  2. 2.Escola de VeterináriaUniversidade Federal de GoiásGoiâniaBrazil
  3. 3.EMBRAPA Recursos Genéticos e BiotecnologiaBrasíliaBrazil
  4. 4.Secretaria de Vigilância em SaúdeMinistério da SaúdeBrasíliaBrazil

Personalised recommendations