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- Title
Procedimentos de predição e efeitos da heterogeneidade de variâncias residuais dentro de tratamentos genéticos.
- Authors
Martinez, Diego Tyszka; Deon Vilela de Resende, Marcos; Higa, Antonio Rioyei; Costa, Reginaldo Brito da
- Abstract
The aim of this study was to compare, through simulation, the BLUP and BLUP-HET procedures for breeding values prediction under heterogeneity of residual variances. Random data were generated with spread sheet, considering a variance of 0,10 and variable residual variance, by number of clones, in order to provide heterogeneity of variances. Actual and residual breeding values obtained were added to the mean 10, in order to obtain positive phenotypic values. Experimental design was random blocks with 100 genotypes, one plant per plot and 2, 5, 10 and 20 repetitions. Data were evaluated using Selegen software, obtaining estimated breeding values through BLUP and BLUP-HET procedures which were compared to actual breeding values. In this study, using two and five repetitions showed low accuracy. With heritability close to 10%, it is recommend to use ten or more repetitions in order to ensure greater accuracy in estimates. This represents no restrain in case of variances heterogeneity within genotypes, being both methods suitable. Nevertheless, for most of the cases, BLUP-HET results in accuracies closer to expected values. Furthermore, its estimates for selection gain are closer to real figures.
- Subjects
PLANT genes; PLANT breeding; PLANT genetics; PLANT selection; COMPUTER software
- Publication
Brazilian Journal of Forest Research / Pesquisa Florestal Brasileira, 2011, Vol 31, Issue 67, p193
- ISSN
1809-3647
- Publication type
Article
- DOI
10.4336/2011.pfb.31.67.193