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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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| Cedillo,Digner Santiago Ortega; Ferreira,Fábio Medeiros; Barros,Willian Silva; Cruz,Cosme Damião; Dias,Luiz Antônio dos Santos; Rocha,Rodrigo Barros. |
| Oil palm, in view of the worldwide consumed oil, is a perennial crop of great importance. Nevertheless, the genetic improvement is still incipient. In this study we applied the selection among and within families and the combined selection, based on the phenotypic values and phenotypic performance (Pi statistic), to verify which strategy obtained the highest genetic gains. Five full-sib families were evaluated in randomized blocks, with five replicates and 12 plants per plot, over five years of successive harvests. The total number of bunches and the total fruit yield per year plant-1 were evaluated. Values of 1.00 and 0.25 for the ratio between the environmental variance among plots and the environmental variance among plants within the plot for both... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Elaeis guineensis Jacq.; Family test; Selection strategies; Pi statistic. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000100011 |
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