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Bioeconomic simulation of Rhipicephalus microplus infestation in different beef cattle production systems in the Brazilian Cerrado. Repositório Alice
CALVANO, M. P. C. A.; BRUMATTI, R. C.; BARROS, J. C.; GARCIA, M. V.; MARTINS, K. R.; ANDREOTTI, R..
CONTEXT: Models are important tools to assess the impacts of tick infestation on the economic performance of different beef cattle production systems. The information from these simulations can be used by producers to evaluate, compare and make decisions about strategic measures to control the tick Rhipicephalus microplus, which cause significant production losses for the beef cattle production chain. OBJECTIVE: The aim of this study was to adapt a model to estimate and compare the economic losses related to the infestation of the tick R. microplus in cattle production systems under grazing conditions with different technological standards in the Brazilian Cerrado biome.
Tipo: Artigo de periódico Palavras-chave: Crossbred cattle; Productive indicators; Tick; Strategic control; Technological standard; Economic indicators.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1137134
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Comparison of breeding value prediction for two traits in a Nellore-Angus crossbred population using different Bayesian modeling methodologies Genet. Mol. Biol.
Hanna,Lauren L. Hulsman; Garrick,Dorian J.; Gill,Clare A.; Herring,Andy D.; Sanders,James O.; Riley,David G..
The objectives of this study were to 1) compare four models for breeding value prediction using genomic or pedigree information and 2) evaluate the impact of fixed effects that account for family structure. Comparisons were made in a Nellore-Angus population comprising F2, F3 and half-siblings to embryo transfer F2 calves with records for overall temperament at weaning (TEMP; n = 769) and Warner-Bratzler shear force (WBSF; n = 387). After quality control, there were 34,913 whole genome SNP markers remaining. Bayesian methods employed were BayesB ( π = 0.995 or 0.997 for WBSF or TEMP, respectively) and BayesC (π = 0 and π), where π is the ideal proportion of markers not included. Direct genomic values (DGV) from single trait Bayesian analyses were compared...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bayesian inference; Crossbred cattle; Genomic prediction; Model comparison.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000500005
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Genomic selection in multi-breed dairy cattle populations R. Bras. Zootec.
Cole,John Bruce; Silva,Marcos Vinicius Gualberto Barbosa da.
ABSTRACT Genomic selection has been a valuable tool for increasing the rate of genetic improvement in purebred dairy cattle populations. However, there also are many large populations of crossbred dairy cattle in the world, and multi-breed genomic evaluations may be a valuable tool for improving rates of genetic gain in those populations. Multi-breed models are an extension of single-breed genomic models in which a genomic relationship matrix is used to account for the breed origin of alleles in the population, as well as allele frequency differences between breeds. Most studies have found little benefit from multi-breed evaluations for pure breeds that have large reference populations. However, breeds with small reference populations may benefit from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crossbred cattle; Crossbreeding; Genomic evaluation; Multi-breed populations.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000400195
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Genomic selection in multi-breed dairy cattle populations. Repositório Alice
COLE, J. B.; SILVA, M. V. G. B..
Abstract Genomic selection has been a valuable tool for increasing the rate of genetic improvement in purebred dairy cattle populations. However, there also are many large populations of crossbred dairy cattle in the world, and multi-breed genomic evaluations may be a valuable tool for improving rates of genetic gain in those populations. Multi-breed models are an extension of single-breed genomic models in which a genomic relationship matrix is used to account for the breed origin of alleles in the population, as well as allele frequency differences between breeds. Most studies have found little benefit from multi-breed evaluations for pure breeds that have large reference populations. However, breeds with small reference populations may benefit from...
Tipo: Separatas Palavras-chave: Crossbred cattle; Crossbreeding; Genomic evaluation; Multi-breed populations.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1062494
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