Results 11 to 20 of about 21,564 (211)

Ingestive Behavior and Body Development of Backgrounded Heifers From Three Genotypes in the Brazilian Pantanal

Animal Research and One Health
The aim was to evaluate the ingestive behavior and body development of backgrounded heifers from three genotypes in the Brazilian Pantanal. Twenty‐two heifers with an average body weight of 180 kg and 15 months of age were used, distributed into three ...
Maria C. E. Queiroz, Aylpy R. D. Santos, Marcelo Vedovatto, André L. J. Ferraz, Evellyn R. F. Bastianel, Marcus V. M. Oliveira, Rosana M. S. Arruda, Dalton M. Oliveira   +7 more
doaj   +2 more sources

Genetic Evaluation Weight, Carcass and Stayability in Nellore Females. [PDF]

J Anim Breed Genet
ABSTRACT Traits related to growth, carcass quality and stayability are key components in enhancing the profitability and sustainability of Nelore cattle production systems. This study aimed to estimate heritabilities and genetic and environmental correlations for these traits using a Bayesian approach. Data from 94,703 females were analysed for weights
de Carvalho IS, Lázaro SF, Carrara ER, de Souza MR, Tonhati H.   +4 more
europepmc   +2 more sources

Genomic insights into the population structure and genetic diversity of Ugandan indigenous cattle. [PDF]

Anim Genet
Abstract Domestic cattle in Africa can be categorized as either taurine (Bos taurus) or indicine (Bos indicus) based on their domestication histories from the extinct aurochs (Bos primigenius). Close to 150 breeds of indigenous cattle are estimated to exist in Africa and have a complex mixture of B. taurus and B. indicus ancestries.
Okwasiimire R, Kugonza DR, Ruvinskiy D, Weldenegodguad M, Ghanem N, Makgahlela ML, Ginja C, Crooijmans RPMA, Kantanen J, Uimari P, Pokharel K.   +10 more
europepmc   +2 more sources

Estimating Linkage Disequilibrium and Effective Population Size Across Generations in Holstein Cattle. [PDF]

Vet Med Sci
This study reveals a significant historical decline in effective population size (Ne) in Holstein cattle due to intensive breeding, with recent stabilization reflecting improved genetic management. Maintaining genetic diversity is vital for sustainable dairy cattle breeding programs.
Salehi R, Javanmard A, Mokhber M, Alijani S.   +3 more
europepmc   +2 more sources

Accuracy of genotype imputation in Nelore cattle [PDF]

Genetics Selection Evolution, 2014
Genotype imputation from low-density (LD) to high-density single nucleotide polymorphism (SNP) chips is an important step before applying genomic selection, since denser chips tend to provide more reliable genomic predictions. Imputation methods rely partially on linkage disequilibrium between markers to infer unobserved genotypes.
Carvalheiro, Roberto, Boison, Solomon A, Neves, Haroldo H R, Sargolzaei, Mehdi, Schenkel, Flavio S, Utsunomiya, Yuri T, O'Brien, Ana Maria Pérez, Sölkner, Johann, Mcewan, John C, van Tassell, Curtis P, Sonstegard, Tad S, Garcia, José Fernando   +11 more
openaire   +5 more sources

A review of thermal stress in cattle

Australian Veterinary Journal, Volume 101, Issue 11, Page 417-429, November 2023., 2023
Cattle control body temperature in a narrow range over varying climatic conditions. Endogenous body heat is generated by metabolism, digestion and activity. Radiation is the primary external source of heat transfer into the body of cattle. Cattle homeothermy uses behavioural and physiological controls to manage radiation, convection, conduction, and ...
RW Shephard, SK Maloney
wiley   +1 more source

Fatores etários no leucograma de fêmeas zebuínas sadias da raça Nelore (Bos indicus) Influence of age on the leukogram values for healthy Nelore (Zebu) cattle

Ciência Rural, 2000
Para avaliar-se a influência dos fatores etários sobre o leucograma de fêmeas zebuínas da raça Nelore, examinaram-se amostras de sangue de 158 animais, distribuídos por sete grupos etários ( até 3 meses; 3 a 6 meses; 6 a 12 meses; 12 a 24 meses; 24 a 48 ...
Joselito Nunes Costa, Fernando José Benesi, Eduardo Harry Birgel, José Luiz D'Angelino, Maria Consuelo Caribé Ayres, Ivan Roque de Barros Filho   +5 more
doaj   +1 more source

Body composition and protein and energy net requeriments of steers of four genetic groups finished in feedlot [PDF]

, 2008
Objetivou-se neste estudo avaliar a composição corporal e as exigências para crescimento de bovinos de quatro grupos genéticos em confinamento. Utilizou-se a metodologia de abate comparativo, com delineamento inteiramente ao acaso, com quatro tratamentos:
ALENCAR, Maurício Mello de, ALLEONI, Guilherme Fernando, CRUZ, Geraldo Maria da, GOULART, Rodrigo Silva, LANNA, Dante Pazzanese Duarte, POTT, Edison Beno, TULLIO, Rymer Ramiz   +6 more
core   +2 more sources

High throughput analysis of MHC class I and class II diversity of Zambian indigenous cattle populations

HLA, Volume 101, Issue 5, Page 458-483, May 2023., 2023
The classical MHC class I and class II molecules play key roles in determining the antigenic‐specificity of CD8+ and CD4+ T‐cell responses—as such characterisation of the repertoire of MHCI and MHCII allelic diversity is fundamental to our ability to understand, and potentially, exploit how genetic diversity influences the outcome of immune responses ...
Isaac Silwamba, Deepali Vasoya, Martin Simuunza, Thomas Tzelos, King S. Nalubamba, Edgar Simulundu, Christina Vrettou, Geoffrey Mainda, Mick Watson, John Bwalya Muma, Timothy Connelley   +10 more
wiley   +1 more source

Characterization of Oligofructose-Induced Acute Rumen Lactic Acidosis and the Appearance of Laminitis in Zebu Cattle

Animals, 2020
The objective of this study was to characterize oligofructose-induced acute rumen lactic acidosis and its consequences in zebu cattle. We used 29 Nellore heifers which were submitted to experimental induction of laminitis by oligofructose excess.
Rejane dos Santos Sousa, Francisco Leonardo Costa de Oliveira, Mailson Rennan Borges Dias, Natalia Sato Minami, Leonardo do Amaral, Juliana Aparecida Alves dos Santos, Raimundo Alves Barrêto Júnior, Antonio Humberto Hamad Minervino, Enrico Lippi Ortolani   +8 more
doaj   +1 more source