03320naa a2200229 a 450000100080000000500110000800800410001910000180006024501300007826000090020852025460021765000200276365000260278365000150280965000210282470000180284570000180286370000180288170000230289970000140292277301540293611360452025-10-20       2025    bl uuuu     u00u1 u    #d1 aDOCEMA, M. L.  aCG?? rootstocks provide high yield for apple trees grown in the two-dimensional central leader system.h[electronic resource]  c2025  aThe expansion of apple cultivation in Brazil has been driven by the adoption of technologies such as effi cient training systems, use of modern rootstocks, and adjustments in planting density, factors that contribute to signif icant increases in yield and fruit quality. In this context, the American Geneva?? rootstocks series (CG), developed by Cornell University, stands out for its early production, high productive potential, and control of plant vigor. The objective of this study was to evaluate productive parameters of ?Maxi Gala? apple trees gra ed onto diff erent rootstocks from the CG series. The study was carried out at the S??o Joaquim Experimental Station ? Agricultural Research and Rural Extension Company of Santa Catarina (Epagri), in an orchard established in 2018 with ?Maxi Gala? apple trees. The trees were trained using a two-dimensional central leader system, with a spacing of 3.5 m x 0.9 m (3,175 plants ha⁻??). The experimental design used was a randomized block design, with four replications and fi ve treatments (rootstocks): G.41, G.222, G.11, G.890, and G.969. Each experimental plot consisted of ten plants. In the 2024/2025 season, the following variables were evaluated: number of fruits per plant, production per plant (kg), estimated yield (t ha⁻??), average fruit weight (g), trunk cross-sectional area (TCSA), expressed in cm??, and yield effi ciency (kg cm⁻??), determined by the ratio between fruit mass and TCSA. Data were subjected to analysis of variance (ANOVA), and means were compared using Tukey?s test (p&lt0.05). ?Maxi Gala? apple trees gra ed onto G.41, G.222, and G.814 rootstocks showed signifi cantly higher yields compared to the other treatments, reaching 67.99; 65.88; and 61.33 t ha⁻??, respectively. These treatments also stood out for having the highest average number of fruits per plant: 182.83; 171.75; and 166.91, respectively. No signifi cant diff erences were observed among treatments regarding average fruit weight. As for TCSA, the G.11 rootstock (11.86 cm??) induced the lowest vigor in ?Maxi Gala? trees compared to G.41 (16.20 cm??), G.222 (20.15 cm??), and G.890 (26.19 cm??), the la  er being signifi cantly the most vigorous. The G.41 rootstock showed the higher yield effi ciency (1.29 kg cm⁻??), compared to G.890 (0.74 kg cm⁻??) and G.969 (0.81 kg cm⁻??) rootstocks. The G.41 and G.222 rootstocks demon strated good productive performance for the ?Maxi Gala? under the edaphoclimatic conditions of S??o Joaquim (SC).  aGeneva?? series  aMalus domestica Borkh  aproduction  atraining systems1 aMARTIN, M. S.1 aDANIEL, E. S.1 aTHUROW, L. B.1 aSILVA FILHO, J. G.1 aLERIN, S.  tIn: CONGRESSO BRASILEIRO DE FRUTICULTURA, 29., 2025, Campinas, SP. Anais [...]. Campinas, SP: Sociedade Brasileira de Fruticultura, 2025. p. 202-202.