Genetic evaluation of bandarra (Schizolobium amazonicum) provenances by the REML/BLUP methodology.

Among the Amazonian trees with potential for timber production, bandarra (Schizolobium amazonicum) stands out for its rapid growth and wood quality. The objective of this study was to quantify the genetic variability among bandarra provenances and the genetic progress with the selection, aiming to characterize an area of seed production. Three bandarra provenances from Rondônia, Pará and Acre states were evaluated in a randomized block design installed in Ouro Preto d’Oeste, Rondônia State, Brazil. The following traits were evaluated: diameter at breast height (cm), total height (m) and wood volume (m3) with nine-year old trees. The analysis of variance indicated the existence of genetic variability among the provenances with 1% probability only for total height and wood volume. The accuracy of selection among provenances indicated that it should be preferred to predict the genetic progress in the next generation. Estimates of genetic progress indicate 20% of gain in wood volume with the selection among provenances and 30% with the selection among and within provenances. The evaluated provenances showed good general adaptability and potential to produce timber in the region and genetic variability should be used in future selection cycles.