Genetic breeding programs of beef cattle in Brazil are including new features, mainly related to reproductive efficiency.Thus, it is necessary to study the effectiveness of selection and quantify genetic gain for these traits in herds. This study estimated genetic and phenotypic parameters and genetic trends for reproductive traits used in breeding programs for Nelore beef cattle. The traits studied were the scrotal circumference (SC) at 365 and 450 days of age (SC365 and SC450), age at first calving (AFC) and gestation length, as a cow trait (GLcow) and a calf trait (GLcalf). The (co)variance components were obtained with the Restricted Maximum Likelihood Methodology in a single and double-trait analysis of the animal model. For scrotal ci...
The total meat yield in a beef cattle production cycle is economically very important and depends on...
The search for a more efficient beef cattle production system has led to the use of considerable num...
The objective of this study was to evaluate the genetic relationship between postweaning weight gain...
Genetic breeding programs of beef cattle in Brazil are including new features, mainly related to rep...
P>Age at first calving (AFC) measures the entry of heifers into the beef cattle production system. T...
In order to achieve improvements in production efficiency in livestock, herds of high sexual precoci...
The objective of this study was to estimate genetic associations between scrotal circumference obtai...
Aiming to establish selection criteria for the Brahman cattle in Brazil, the objective of this paper...
We estimated genetic parameters for various phases of body and testicular growth until 550 days of a...
The aim of this study was to estimate genetic parameters between scrotal circumference obtained at 1...
Abstract The Midwest region has excelled as a beef producer and producing efficiently has been the g...
This study was conducted to examine the relationship among average annual productivity of the cow (P...
Stayability is a trait that has a large impact on the costs of rural properties because it is direct...
ABSTRACT This study aimed to estimate heritability, genetic, and residual correlations between repro...
O objetivo deste trabalho foi estimar os coeficientes de herdabilidade da idade ao primeiro parto, d...
The total meat yield in a beef cattle production cycle is economically very important and depends on...
The search for a more efficient beef cattle production system has led to the use of considerable num...
The objective of this study was to evaluate the genetic relationship between postweaning weight gain...
Genetic breeding programs of beef cattle in Brazil are including new features, mainly related to rep...
P>Age at first calving (AFC) measures the entry of heifers into the beef cattle production system. T...
In order to achieve improvements in production efficiency in livestock, herds of high sexual precoci...
The objective of this study was to estimate genetic associations between scrotal circumference obtai...
Aiming to establish selection criteria for the Brahman cattle in Brazil, the objective of this paper...
We estimated genetic parameters for various phases of body and testicular growth until 550 days of a...
The aim of this study was to estimate genetic parameters between scrotal circumference obtained at 1...
Abstract The Midwest region has excelled as a beef producer and producing efficiently has been the g...
This study was conducted to examine the relationship among average annual productivity of the cow (P...
Stayability is a trait that has a large impact on the costs of rural properties because it is direct...
ABSTRACT This study aimed to estimate heritability, genetic, and residual correlations between repro...
O objetivo deste trabalho foi estimar os coeficientes de herdabilidade da idade ao primeiro parto, d...
The total meat yield in a beef cattle production cycle is economically very important and depends on...
The search for a more efficient beef cattle production system has led to the use of considerable num...
The objective of this study was to evaluate the genetic relationship between postweaning weight gain...