Use of multivariate analyses for determining heat tolerance in Brazilian cattle

Genetic Basis for Heat Tolerance in Cattle

Heat tolerance in Brazilian hair sheep

OBJECTIVE The aim of this study was to evaluate heat tolerance using heat tolerance indices, physiological, physical, thermographic, and hematological parameters in Santa Ines and Morada Nova sheep breeds in the Federal District, Brazil. METHODS Twenty-six adult hair sheep, one and a half years old, from two genetic groups (Santa Ines: 12 males and 4 females; Morada Nova: 7 males and 3 female...

Multivariate analyses of carcass traits for Angus cattle

9 Multivariate analyses of carcass traits for Angus cattle, consisting of 6 traits recorded 10 on the carcass and 8 auxiliary traits measured by ultra-sound scanning of live animals, 11 are reported. Analyses were carried out by restricted maximum likelihood, fitting a 12 number of reduced rank and factor-analytic models for the genetic covariance matrix. 13 Estimates of eigen-values and -vecto...

Genetic evaluation for heat tolerance in Angus cattle

Because beef cattle are raised in extensive conditions, growth can vary across production environments. Within-breed genotype x environment interactions have been reported for weaning weight and yearling weight (Butts et al., 1971; Bertrand et al., 1987). When Hereford cattle were adapted to the Florida or the Montana climate, calves had 20 lb heavier weaning weights when grown in the environme...

the use of appropriate madm model for ranking the vendors of mci equipments using fuzzy approach

abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...