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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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| Garcia,Diogo Anastácio; Pereira,Idalmo Garcia; Fonseca e Silva,Fabyano; Rosa,Guilherme Jordão de Magalhães; Pires,Aldrin Vieira; Leandro,Roseli Aparecida. |
| The objective of this study was to evaluate the use of probit and logit link functions for the genetic evaluation of early pregnancy using simulated data. The following simulation/analysis structures were constructed: logit/logit, logit/probit, probit/logit, and probit/probit. The percentages of precocious females were 5, 10, 15, 20, 25 and 30% and were adjusted based on a change in the mean of the latent variable. The parametric heritability (h²) was 0.40. Simulation and genetic evaluation were implemented in the R software. Heritability estimates (ĥ²) were compared with h² using the mean squared error. Pearson correlations between predicted and true breeding values and the percentage of coincidence between true and predicted ranking, considering the 10%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Early pregnancy; Genetic parameters; GLMM; Link function. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000100008 |
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