Results 51 to 60 of about 14,063 (219)

Stayability in the Era of Early‐Challenged Females: Genetic Parameters and Correlations With Economically Relevant Traits

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT This study aimed to estimate the variance components, heritabilities and genetic correlations between four new different categories of stayability (STAY48‐2, STAY48‐3, STAY54‐2, STAY54‐3) with weight at 240 days of age (W240), weight at 450 days of age (W450), scrotal circumference at 365 days of age (SC365), age at puberty in males (APM ...
Letícia Silva Pereira, Larissa Bordin Temp, Gabriel Gubiani, Miller Teodoro, Cláudio Ulhoa Magnabosco, Fernando Baldi   +5 more
wiley   +1 more source

Feed restriction of F1 Holstein × Zebu cows in the final third of lactation modifies intake, nutrient digestibility, feeding behavior, and performance

Revista Brasileira de Zootecnia, 2019
The objective of this study was to evaluate the effect of quantitative feed restriction level on nutrient intake and digestibility, nitrogen balance, efficiency and feeding behavior, and productive performance of F1 Holstein × Zebu cows in late lactation.
P. Santana, V. R. Rocha Júnior, J. Ruas, F. P. Monção, Luana Alcântara Borges, J. Rigueira, Joyce Cipriana Pacheco Ramos, V. M. Gomes   +7 more
semanticscholar   +1 more source

Genetic Parameters for Novel Feedlot Profitability‐Related Traits in Nelore Cattle

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT This study aimed to estimate (co)variance components and genetic parameters for accumulated profitability (AFP) and profit per kilogram of liveweight gain (PFT), and their relationships with weight at 450 days of age (W450), scrotal circumference at 365 days of age (SC365), age at first calving (AFC), probability of precocious calving at 30 ...
Letícia Pereira, Fernando Baldi, Guilherme Jordão Magalhães Rosa, José Bento Sterman Ferraz, Tiago Zanett Albertini, Minos Carvalho, Raysildo Barbosa Lobo, Eduardo da Costa Eifert, Elisa Peripolli, Cláudio Ulhôa Magnabosco   +9 more
wiley   +1 more source

Estudo genético quantitativo de características de carcaça e perímetro escrotal utilizando inferência Bayesiana em novilhos nelore

Bioscience Journal, 2010
Objetivou-se com este estudo avaliar o método de amostragem de Gibbs (GS) como ferramenta para se estimar os componentes de (co)variância e parâmetros genéticos para características de carcaça e reprodutivas: área de olho de lombo (AOL); espessura de ...
Vanessa Barbosa, Cláudio Ulhoa Magnabosco, José Benedito de Freitas Trovo, Carina de Ubirajara Faria, Dyomar Toledo Lopes, Marco Antônio de Oliveira Viu, Raysildo Barbosa Lôbo, Mariana Márcia Santos Mamede   +7 more
doaj  

Effect of polymorphisms in the Slc11a1 coding region on resistance to brucellosis by macrophages in vitro and after challenge in two Bos breeds (Blanco Orejinegro and Zebu)

Genetics and Molecular Biology, 2010
The resistance/susceptibility of selected cattle breeds to brucellosis was evaluated in an F1 population generated by crossing animals classified as resistant (R) and susceptible (S) (R x R, R x S, S x R, S x S) based on challenges in vitro and in vivo ...
Rodrigo Martínez, Susana Dunner, Rubén Toro, Jaime Tobón, Jaime Gallego, Javier Cañón   +5 more
doaj   +1 more source

Impact of Model Parameterisation and Variance Component Estimates on Genomic Predictions of Carcass Traits in Montana Composite Cattle

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT This study evaluated the influence of variance component (VC) estimates, obtained from different models and two relationship matrices, pedigree‐based (BLUP) and genomic information‐based (ssGBLUP), on genomic predictions of carcass traits in Montana composite cattle.
Caroline Assis Almeida, Felipe Eguti de Carvalho, Flávia Cristina Bis, Rachel Santos Bueno Carvalho, Elisângela Chicaroni de Mattos, Rafael Espigolan, Joanir Pereira Eler, Luís Telo da Gama, Fernando Baldi, José Bento Sterman Ferraz   +9 more
wiley   +1 more source

Probability density function of the number of embryos collected from superovulated Nelore breed donors Função de densidade de probabilidade do número de embriões produzidos por doadoras da raça Nelore

Scientia Agricola, 2009
Several models have been developed to evaluate reproductive status of cows through concentration of progesterone in milk, the effect of sex selection in the commercial production of herds and bioeconomic performance of the multiple ovulation and embryo ...
Renato Travassos Beltrame, Luis Gustavo Barioni, Celia Raquel Quirino, Ozanival Dario Dantas   +3 more
doaj   +1 more source

Effects of body conformation and udder morphology on milk yield of zebu cows in North region of Cameroon

Veterinary World, 2017
Aim: The aim of the study was to assess the effect of udder morphological characteristics on milk yield in zebu cows of Cameroon. Materials and Methods: The diameter and height of the udder, length and diameter of the teat, and the milk yield were ...
K. J. Mingoas, J. Awah-Ndukum, Houinga Dakyang, P. A. Zoli   +3 more
semanticscholar   +1 more source

Genomic Prediction Ability Using Linear and Threshold Approaches for Different Stayability Definitions in Nellore Females

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Enhancing female longevity through regular calvings improves herd replacement rates and reduces the costs associated with replacing low reproductive efficiency animals. Stayability (STAY), defined as a cow's ability to remain productive in the herd, is a categorical trait that challenges traditional genetic evaluation due to its non‐normal ...
Letícia Silva Pereira, Larissa Bordin Temp, Eduarda da Silva Oliveira, Jorge Hidalgo, Cláudio Ulhoa Magnabosco, Fernando Baldi   +5 more
wiley   +1 more source

Consumo alimentar e sua predição pelos sistemas NRC, CNCPS e BR-Corte, para tourinhos zebuínos confinados Feed intake and its prediction using the NRC, CNCPS and BR-Corte systems for confined young Zebu bulls

Revista Ciência Agronômica, 2012
Objetivou-se avaliar a predição de consumo de matéria seca (CMS) pelos sistemas CNCPS 5.0, NRC e BR-CORTE, bem como o consumo de nutrientes por tourinhos zebuínos confinados.
Julimar do Sacramento Ribeiro, Marcio Machado Ladeira, Otavio Rodrigues Machado Neto, Fabrício Rodrigues Campos   +3 more
doaj   +1 more source