Data/hora: 09/06/2024 17:03:54

Provedor de dados: | 74
País: | Brazil
Título: | Bias in the prediction of genetic gain due to mass and half-sib selection in random mating populations
Autores: | Viana,José Marcelo Soriano; Faria,Vinícius Ribeiro; Silva,Admilson da Costa e.
Data: | 2009-01-01
Ano: | 2009
Palavras-chave: | Predicted genetic gain; Realized genetic gain; Recurrent selection.
Resumo: | The prediction of gains from selection allows the comparison of breeding methods and selection strategies, although these estimates may be biased. The objective of this study was to investigate the extent of such bias in predicting genetic gain. For this, we simulated 10 cycles of a hypothetical breeding program that involved seven traits, three population classes, three experimental conditions and two breeding methods (mass and half-sib selection). Each combination of trait, population, heritability, method and cycle was repeated 10 times. The predicted gains were biased, even when the genetic parameters were estimated without error. Gain from selection in both genders is twice the gain from selection in a single gender only in the absence of dominance. The use of genotypic variance or broad sense heritability in the predictions represented an additional source of bias. Predictions based on additive variance and narrow sense heritability were equivalent, as were predictions based on genotypic variance and broad sense heritability. The predictions based on mass and family selection were suitable for comparing selection strategies, whereas those based on selection within progenies showed the largest bias and lower association with the realized gain.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300012
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572009005000064
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.32 n.3 2009
Fonte: | info:eu-repo/semantics/openAccess