The aim of this study was to assess the efficiency of the simulated individual BLUP (BLUPIS) method in selecting genotypes within full-sib families of sugarcane in ratoon stage, through comparison with selection using the individual BLUP method. The optimal number of genotypes to be selected in the best families were established for mean stems mass, total soluble solids assay (BRIX), ton of stalks per hectare, and BRIX tons per hectare traits. Seventeen full-sib families were assessed in the Centre for Experimentation in Sugarcane, located in Oratórios, MG, Brazil. Mixed model methodology was used to predict the genotypic effects of each family and the genotypic values of each individual within family. BLUPIS method is efficient for individual selection. The optimal number of genotypes to be selected in the best family for obtaining higher efficiency of the BLUPIS method is 100 in the majority of cases.
Saccharum sp. ; best linear unbiased predictors (BLUP); BLUPIS; selection strategies; sugarcane breeding
and
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and determination coefficients (R²), associated with regressions between the
total number of genotypes selected in each full-sib family of sugarcane
through the individual genotypic value via BLUPI, and the total number of
genotypes to be selected in each family via BLUPIS, for the assessed traits,
considering the number of individuals to be selected in the best family
(nj), equals to 50, 100 and 120, of sugarcane at the ratoon
stage
; selection
accuracy of families (Acfam); coefficient of genotypic
variation (CVgi %) and coefficient of residual variation
(CVe %).
