SELEÇÃO PARA PRODUTIVIDADE, ESTABILIDADE E ADAPTABILIDADE DE CLONES DE CANA-DE-AÇÚCAR EM TRÊS AMBIENTES NO ESTADO DO PARANÁ VIA MODELOS MISTOS

The objective of this study was to estimate genetic parameters and predict genotypic values of sugarcane clones in T3 stage in the state of Parana using the REML/BLUP methodology. This work was carried out in three environments of production in State of Parana (Colorado, Paranavai and Mandaguacu), on T3 stage with 236, 243 and 202 clones, respectively, and two standard varieties. The design of the experiment was an augmented block with two repetitions and the variable evaluated was tones of brix per hectare (TBH). The clones were selected via mixed models, using the MHPRVG method (harmonic mean of the relative performance of genetic values). The most adapted, stable and productivity clones according to MHPRVG method were: RB9371, RB975245 e RB975316. The use of MHVG method (harmonic mean of genetic values) must be employed with caution in unbalanced experiments, when the tested clones are not presented in all environments.