Results 141 to 150 of about 85,904 (291)

Application of Genomic Random Regression Models for Genetic Parameter Estimations of Female Fertility Traits in Different Parities in German Holsteins

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT The aim of the present study was to infer genetic (co) variance components and to estimate parity‐specific breeding values for the female fertility traits non‐return rate after 56 days, the interval from calving to first service and days open by applying random regression models on a time‐dependent parity scale. In this regard, we considered a
Sina Sakhaei‐far, Tong Yin, Sven König   +2 more
wiley   +1 more source

Genetic Parameter Estimation for Plasma Biomarkers Associated With Energy Reserves During Critical Physiological Stages in Sheep

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT The ability of ruminants to mobilise and restore body reserves (BR) over time, referred to as BR dynamics, is currently considered an interesting biological component to be included in breeding programs targeting enhanced BR resilience. However, genetic studies of proxies for BR levels and BRD remain scarce, particularly in small ruminants ...
Agnes Nyamiel, Andres Legarra, Didier Marcon, Christian Durand, Sébastien Douls, Gaetan Bonnafe, Anne Tesnière, Eliel González‐García, Dominique Hazard   +8 more
wiley   +1 more source

Lower Serum Free Amino Acids in Holstein Cows with Milk Fever in Field Case

Acta Veterinaria
This study was conducted to investigate the relationship between serum free amino acids (FAA) and the onset of milk fever in dairy cows around the time of calving.
Kudo Katsunori, Ohtsuka Hiromichi
doaj   +1 more source

Genetic Parameters of Age at Conception in Nellore Females Using Threshold Models

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Age at conception is a critical factor in the intensification of production systems. It is crucial for intensifying production, optimising reproductive efficiency and boosting Nellore female productivity for genetic progress. However, the low heritability estimates currently limit the effectiveness of selection responses, thereby underscoring ...
Raimundo Nonato Colares Camargo Júnior, Cláudio Vieira de Araújo, Marina de Nadai Bonin Gomes, Feliciano Benedetti de Freitas, Welligton Conceição da Silva, Simone Inoe de Araújo, Éder Bruno Rebelo da Silva, Alison Miranda Santos, José Ribamar Felipe Marques, José de Brito Lourenço‐Júnior, André Guimarães Maciel e Silva   +10 more
wiley   +1 more source

Genetic Evaluation of Beef Sires Using a Beef‐on‐Dairy Crossbred Reference Population

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT In recent years, Beef‐on‐Dairy (BoD) crossbreeding programs have gained momentum to enhance dairy cattle's economic and genetic merits while meeting the demand for high‐quality beef. However, bulls with superior growth potential can lead to calving problems; thus, Holstein dairy farmers must decide which semen to use to avoid calving problems ...
Julius Mugambe, Christin Schmidtmann, Jorge Hidalgo, Rana Ahmed, Georg Thaller   +4 more
wiley   +1 more source

Estimation of genetic variation in the interval from calving to postpartum ovulation of dairy cows [PDF]

, 1997
Darwash, A.O., Lamming, G.E., Woolliams, John   +2 more
core   +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

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

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

Genomic Analysis of Inbreeding Depression on Productive Traits in Rubia Galega Beef Cattle Breed

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT In autochthonous livestock breeds with small populations, such as the Rubia Galega from Galicia (Spain), mating between relatives is common and can lead to inbreeding depression. Genomic inbreeding coefficients were estimated for 4984 animals using ~63,000 SNPs to assess inbreeding depression in four key traits: age at first calving (AFC) with
N. Mejuto‐Vázquez, C. Hervás‐Rivero, R. Rodríguez‐Bermúdez, D. López‐Carbonell, M. Hermida, P. Martínez, L. Varona   +6 more
wiley   +1 more source