Results 11 to 20 of about 35,507 (209)

Genetic Parameters of Methane Emission, Feed Efficiency, Feeding Behaviour, and Growth Traits in Beef Cattle. [PDF]

J Anim Breed Genet
ABSTRACT Climate change has intensified the need to reduce greenhouse gas emissions, particularly methane (CH4) from enteric fermentation. Genetic selection has emerged as a promising mitigation strategy; however, studies on Bos taurus indicus, especially Nellore cattle, remain limited.
Silva JA, Valente JPS, Mota LFM, Rodrigues GRD, Soares TLS, Marcatto JOS, Pelaez AM, Monteiro FM, Canesin RC, Albuquerque LG, Mercadante MEZ.   +10 more
europepmc   +2 more sources

Genetic Indicators of Performance Resilience in Barrel Racing Quarter Horses. [PDF]

Anim Genet
ABSTRACT Resilience, defined as the capacity to maintain consistent performance under variable conditions, has emerged as a relevant breeding objective in livestock systems, yet remains largely unexplored in equine populations. The objectives of this study were to (1) derive indicators of resilience from longitudinal barrel racing time (BRT) records in
Santana ML, Bignardi AB.
europepmc   +2 more sources

Thermal Thresholds and Genetic Sensitivity in Barrel Racing Performance of Quarter Horses Across Temperature-Humidity Indices. [PDF]

J Anim Breed Genet
ABSTRACT Heat stress is an increasingly important challenge for the performance and welfare of equine athletes, particularly in competitions conducted across diverse climatic conditions. Understanding the genetic basis of performance responses to increasing thermal load is therefore essential to support robust genetic evaluation and sustainable ...
Santana ML, Bignardi AB.
europepmc   +2 more sources

Characterization and Antifungal Activity of a Hevein-Like Peptide-Containing Extract From <i>Capsicum annuum</i> Leaves Against Phytopathogenic Fungi. [PDF]

Int J Microbiol
This study is aimed at isolating and characterizing antimicrobial peptides (AMPs) from the leaves of Capsicum annuum (L.) cv. Carioquinha and investigating their antifungal activity and mechanism of action against phytopathogenic fungi. An initial extract was obtained from leaves through hydromethanolic extraction followed by partitioning with ...
de Oliveira SSS, Cherene MB, Taveira GB, Pinto VB, da Conceição Moura da Silva MP, Rodrigues R, de Oliveira Mello É, de Oliveira Carvalho A, Gomes VM.   +8 more
europepmc   +2 more sources

Genotype-By-Environment Interaction for Scrotal Circumference in Young Nellore Bulls Under Pasture and Feedlot Conditions and Its Correlation With Days to Calving. [PDF]

Anim Genet
ABSTRACT Scrotal circumference (SC) is a key reproductive indicator in beef cattle and an important predictor of male puberty and correlated female fertility. In this study, we evaluated young Nellore bulls raised under combinations of pasture and feedlot environments and modeled SC using a “double” reaction norm model. Additive genetic variance for SC
Silva CA, Bignardi AB, Cyrillo JNSG, Mercadante MEZ, Santana ML.   +4 more
europepmc   +2 more sources

Grass species and climatic season impact on Rhipicephalus microplus temporal abundance in a tropical region. [PDF]

Pest Manag Sci
The interaction between grass species and climatic season shapes the population dynamics of the cattle tick, Rhipicephalus microplus. This information highlights the potential of forage species to influence off‐host tick dynamics. Additionally, minimum temperature and minimum relative humidity were the most influential microclimatic predictors of ...
Lima VH, de Souza Ribeiro-Silva C, do Nascimento Pinto SM, de Oliveira Monteiro CM, Rizzo PV, Freitas FMC, de Andrade Moral R, Mascarin GM, Fernandes ÉKK.   +8 more
europepmc   +2 more sources

Genetic Parameter Estimation for Pregnancy Loss and Their Association With Reproductive and Growth Traits in Brahman Cattle Under Extensive Tropical Conditions. [PDF]

J Anim Breed Genet
ABSTRACT This study estimated genetic parameters for pregnancy loss (PL) in Brahman cattle and evaluated the genetic correlation of PL with growth and reproductive traits using both the pedigree relationship matrix (A) and pedigree plus genomic relationship matrix (H). Data were collected from two herds in Bolivia, focusing on three age groups: heifers,
Cardona-Cifuentes D, de Albuquerque LG, Arias M, Caivio-Nasner S, Camaripano L, Gonzalez-Herrera LG, Schmidt PI, Baldi F.   +7 more
europepmc   +2 more sources

Genomic Prediction and Genome-Wide Association Analysis of Heat Tolerance for Milk Yield in Buffaloes Using a Reaction Norm Model. [PDF]

J Anim Breed Genet
ABSTRACT The aim of this study was to evaluate the impact of incorporating genomic information on the estimation of genetic (co)variance components and the accuracy of breeding values for milk yield under varying thermal environments, and to identify SNPs associated with genes that play significant roles in heat tolerance.
Stefani G, Santana ML, El Faro L, Tonhati H.   +3 more
europepmc   +2 more sources

O melhoramento sem fronteiras: anais. [PDF]

, 2023
Em 2020, enfrentamos o desafio de planejar e realizar um evento que, até então, era totalmente presencial, em apenas sessenta dias. Realiza- mos um simpósio produzido integralmente de maneira remota.
SIMPÓSIO DE MELHORAMENTO DE PLANTAS, 3., 2023, Brasília, DF.
core   +1 more source

Phenotypic Definition Influences Genetic Inference and Predictive Ability for Reining Performance in Quarter Horses Using Random Regression Models. [PDF]

Anim Sci J
ABSTRACT Reining performance is influenced by subjectivity and competition structure, challenging genetic evaluation. This study estimated genetic parameters for reining performance in Brazilian Quarter Horses using random regression models (RRM) and evaluated how alternative phenotypic definitions affect genetic inference and predictive ability.
Santana ML, Bignardi AB.
europepmc   +2 more sources