Abstract
Best Linear Unbiased Prediction (BLUP) has become the most widely used method for genetic assessment of animal and perennial species, and it is potentially relevant for annual crops. The objective of this study was to assess this method for selection within non-inbred families in recurrent breeding programs. The ‘animal model’ was fitted. The data were expansion volume (EV) and grain yield of plants in recombination plots of two to three selection cycles in the popcorn population Viçosa, with half- and full-sib progenies. The ASReml program was used to perform the analyses. For both EV and yield the breeding values predicted from the additive and additive-dominant models were highly correlated. Multi-generation BLUP was, in general, more accurate than single-generation analysis. These two methods resulted in highly correlated predicted breeding values. The dominance genetic values predicted from the single- and multi-generation analysis were also highly correlated. The pedigree information reduced the percentage of coincidences among the selected individuals relative to phenotypic selection mainly in the population structured in half-sib families. Based on breeding values predicted by BLUP analysis, the most efficient selection procedure was mass selection.
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Acknowledgements
We thank the Foundation for Research Support of Minas Gerais State (Fapemig), the Brazilian Federal Agency for Support and Evaluation of Graduate Education (Capes) and the National Council for Scientific and Technological Development (CNPq) for financial support.
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Appendix
Appendix
ASReml code for the additive-dominant model
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!Workspace 200
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BLUP analysis, population structured in half- and full-sib families, two cycles
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a 1535 !p # additive value
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d 1535 # dominance value
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pop 2 # population
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env 4 # environment
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ev # expansion volume
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y # grain yield
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z ! = ev ! + y # to permit estimation of gen./non gen. corr./covariance
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ped.txt # pedigree file
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Amatrix.grm # additive relationship matrix
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Dmatrix.grm # dominance relationship matrix
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data.asd # data file
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!ddf # correction of df by the Kenward-Roger method
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!continue # to continue REML process
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!maxit 30 # maximum number of interactions
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ev or y or z ~ mu pop env pop.env !r a d
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predict a !vpv # necessary to compute generalized measure of heritability
The additive and dominance relationship matrices files were generated by a program developed in REALbasic 5.5. To read the prediction error variance matrix in the file .pvs another REALbasic 5.5 program was developed.
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Viana, J.M.S., de Almeida, Í.F., de Resende, M.D.V. et al. BLUP for genetic evaluation of plants in non-inbred families of annual crops. Euphytica 174, 31–39 (2010). https://doi.org/10.1007/s10681-009-0094-2
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DOI: https://doi.org/10.1007/s10681-009-0094-2