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Genetic correlation of traits measured by ultrasound at yearling and 18 months of age in Nellore beef cattle
(2015-01-01)
The objective of this study was to estimate genetic parameters for carcass traits measured by ultrasound at yearling (Y) and 18 months of age (post-yearling, PY) in order to identify the most appropriate age for the ...
Desempenho ponderal de machos Charolês, Nelore e suas cruzas F1
(Universidade Federal de Santa MariaBRZootecniaUFSMPrograma de Pós-Graduação em Zootecnia, 2012-02-28)
The objective of the present study was to evaluate in Charolais and Nellore calves
and their crossbred F1 the genetic (crossbreed system, genetic group and heterotic and
racial additive effects) and environmental effects ...
Selection for higher body weight in Nelore cattle is effective in achieving an increase of longissimus muscle area without reducing subcutaneous fat thickness
(Sociedade Brasileira de Zootecnia, 2012-06-01)
The objectives of this study were to estimate heritabilities and genetic and phenotypic correlations between carcass traits measured by ultrasound and other economically important traits generally used as selection criteria ...
Selection for higher body weight in Nelore cattle is effective in achieving an increase of longissimus muscle area without reducing subcutaneous fat thickness
(Sociedade Brasileira de Zootecnia, 2012-06-01)
The objectives of this study were to estimate heritabilities and genetic and phenotypic correlations between carcass traits measured by ultrasound and other economically important traits generally used as selection criteria ...
Unravelling biological biotypes for growth, visual score and reproductive traits in Nellore cattle via principal component analysis
(2018-11-01)
Principal component analysis (PCA) is used to summarize important information from multivariate data in sets of new variables named principal components (PCs). In animal breeding, these new composite variables can be used ...
Portal Vein Dopplerflowmetry in healthy sheep according to age
(2017-01-01)
Pulsed Doppler ultrasound was used to evaluate portal blood flow, portal velocity and portal congestion index in 24 healthy sheep divided into groups (lambs, yearlings and ewes), according to age. Measurements were performed ...
Puberdade em novilhas Nelore provenientes de duas linhas de seleção para peso
(Universidade Estadual Paulista (Unesp), 2011-02-11)
O presente trabalho teve como objetivo avaliar por ultrassonografia os ovários e suas estruturas e os cornos uterinos, além de quantificar os níveis séricos de progesterona para estudar suas relações com o desenvolvimento ...
Genetic analyses on bodyweight, reproductive, and carcass traits in composite beef cattle
(2017-01-01)
In beef cattle, growth, reproductive, and carcass traits have been studied for improving productivity and quality of meat products. The aim of this study was to estimate genetic parameters for birth (BW), weaning (WW) and ...