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	Provedor de dados Animal Sciences (2) Autor Shadparvar, Abdol Ahad (2) Atefi, Abbas (1) Chegini, Arash (1) Ghavi Hossein-Zadeh, Navid (1) Hossein-Zadeh, Navid Ghavi (1) Hosseini-Moghadam, Hossein (1) Mais... Palavra-chave Accuracy (1) Dairy cow (1) Genetic architecture (1) Genetic relationship (1) Genomic (1) Iteration (1) Semi parametric methods (1) Udder type (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2016 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Estimation of genetic and environmental relationships between milk yield and different measures of mastitis and hyperkeratosis in Holstein cows Animal Sciences Chegini, Arash; Hossein-Zadeh, Navid Ghavi; Hosseini-Moghadam, Hossein; Shadparvar, Abdol Ahad. In this research, records of milk yield, mastitis occurrence and teats hyperkeratosis of 453 Holstein cows from a large herd with calving dates from December 2012 to December 2014 was used to estimate genetic and environmental correlations between milk yield, mastitis and hyperkeratosis. The highest and the lowest number of mastitis occurrence were in winter (January to March) and spring (April to June), respectively. Also, the highest and the lowest averages of days in milk at the time of mastitis occurrence were observed in winter and spring, respectively (162.53 vs. 29.67 days). The total number of mastitis occurrence was 151 times and in average a sick cow was infected 1.649 times. Obtained results showed low heritabilities for measures of mastitis... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dairy cow; Genetic relationship; Iteration; Udder type. Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/29207 Comparison of whole genome prediction accuracy across generations using parametric and semi parametric methods Animal Sciences Atefi, Abbas; Shadparvar, Abdol Ahad; Ghavi Hossein-Zadeh, Navid. Accuracy of genomic prediction was compared using three parametric and semi parametric methods, including BayesA, Bayesian LASSO and Reproducing kernel Hilbert spaces regression under various levels of heritability (0.15, 0.3 and 0.45), different number of markers (500, 750 and 1000) and generation intervals of validating set. A historical population of 1000 individuals with equal sex ratio was simulated for 100 generations at constant size. It followed by 100 extra generations of gradually reducing size down to 500 individuals in generation 200. Individuals of generation 200 were mated randomly for 10 more generations applying litter size of 5 to expand the historical generation. Finally, 50 males and 500 females chosen from generation 210 were randomly... Tipo: Info:eu-repo/semantics/article Palavras-chave: Accuracy; Genomic; Semi parametric methods; Genetic architecture. Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/32023 Registros recuperados: 2 Primeira ... 1 ... Última

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