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| Rennó,Francisco Palma; Araújo,Cláudio Vieira de; Pereira,José Carlos; Freitas,Marcelo Silva de; Torres,Robledo de Almeida; Rennó,Luciana Navajas; Azevêdo,José Augusto Gomes; Kaiser,Fernando da Rocha. |
| Foram avaliados dados de classificação para tipo fornecidos pela Associação Brasileira de Criadores de Gado Pardo-Suíço com o objetivo de avaliar os efeitos de fatores não-genéticos, estimar a herdabilidade e as correlações genéticas e fenotípicas das características lineares de tipo, características de classificação e a classificação final, bem como avaliar as correlações das características de tipo com a produção de leite. Para o estudo dos fatores não-genéticos foi utilizado o método dos quadrados mínimos, utilizando-se o procedimento GLM do SAS, e, para a estimativa da herdabilidade e correlações genéticas e fenotípicas, foi utilizado um modelo animal. Os componentes de variância e (co)variância foram obtidos com o programa MTDFREML (Multiple Trait... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Características de tipo; Parâmetros genéticos; Pardo-Suíço. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982003000600017 |
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| Lopes,Jader Silva; Rorato,Paulo Roberto Nogara; Breda,Fernanda Cristina; Freitas,Marcelo Silva de; Farah,Michel Marques; Carreño,Luis Orlando Duitama; Oliveira,Mauricio Morgado de. |
| ABSTRACT The objective of this study was to evaluate the impact of farrowing and mortality rates on inbreeding levels and genetic gain through data simulation. Data came from two real populations A and B, composed of Pietrain and Landrace breed pigs, respectively. To generate the simulated populations, a Fortran-language simulator was developed using the (co)variances of the breeding values and productive and reproductive information obtained from populations A and B, as well as restrictions on mating and animals selected per generation. Two data files were created. The first contained the pedigree of the previous 10 years, with 21,906 and 251,343 animals in populations A and B, respectively. The second included the breeding values for age, backfat... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Farrowing rate; Mortality rate; Viability of piglets. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100306 |
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| Lopes,Jader Silva; Rorato,Paulo Roberto Nogara; Mello,Fernanda Cristina Breda; Freitas,Marcelo Silva de; Prestes,Alan Miranda; Garcia,Diogo Anastácio; Oliveira,Maurício Morgado de. |
| ABSTRACT: The objective of this study was to evaluate, through data simulation, the impact of restrictions on the maximum number of full- and half-sibs selected for males and females on the level of inbreeding and genetic gain of the herd. Data came from real populations A and B, composed of Pietrain and Landrace breed pigs, respectively. To generate the simulated populations, a Fortran-language simulator was developed using the (co)variances of the breeding values and the productive and reproductive rates obtained from populations A and B. Two data files were created. The first contained the pedigree of the previous 10 years, with 21,906 and 251,343 animals in populations A and B, respectively. The second included breeding values for age to reach 110 Kg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Full-sibs; Half-sibs; Landrace breed; Pietrain breed; Selection strategies. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000700653 |
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