02855naa a2200241 a 450000100080000000500110000800800410001910000180006024501420007826000090022050000180022952020220024765000120226965000220228165000190230365300110232265300190233370000170235270000300236970000190239970000170241877301780243518677042010-11-26       2010    bl uuuu     u00u1 u    #d1 aSTUCHI, E. S.  aProduction and Citrus Variegated Chlorosis (CVC) tolerance of portuguese midseason sweet orange selections (Citrus sinensis (L.) Osbeck).  c2010  aT02.225, pdf.  aProduction and CVC tolerance of 14 Portuguese midseason sweet orange selections (‘Tua 145’, ‘Tua Graúda’, ‘Tua Ponte’, ‘Tua Sr. Mamede’, ‘Tua 149’, ‘Tua 160’, ‘Tua 176’, ‘Convento’, ‘Grada’, ‘Jaffa’, ‘Ovale’, ‘Setúbal 174’, ‘Setúbal 180’ and ‘Pera de Vidigueira Sr. Antunes’) were evaluated in the period 2005-2008. Trees were budded onto Sunki mandarin and planted in 2001 at 7 × 5 m in Bebedouro, SP, Brazil. Experimental design was randomized blocks, with three replications and two trees in the unit. Data was submitted to ANOVA with means compared by the Scott- Knott Test (P &lt 0.05). ‘Tua 145’, ‘Tua Ponte’, ‘Jaffa’ and ‘Ovale’ were included in a low-production selections group (61.0-78.7 kg/tree or 17.4-22.5 t·ha-1). All other selections yielded 130.2 to 170.0 kg/tree or 37.2 to 48.5 t·ha-1 in 2005-2008. Production in the first two harvests ranged from 22% to 33% of the total yield. ‘Setúbal 174’ showed a more pronounced alternate bearing index (0.74) than ‘Tua 145’ (0.46). In all years, fruits were harvested in September, confirming the midseason maturing behavior. Juice content varied from 40 to 51%, and ‘Tua Ponte’ was not indicated as a suitable selection for juice extraction because of its low yield and juiciness. The Portuguese sweet orange selections were grouped in three classes of ratio: &gt 19 (‘Jaffa’); 15-18 (‘Ovale’ and ‘Tua Graúda’) and &lt 14 (all other varieties). Fruit ripening was directly influenced by the juice acid concentrations. Highest total soluble solids (2.33-2.46 kg/box) were accumulated by ‘Tua Ponte’, ‘Convento’ and ‘Setúbal 180’. CVC did not affect ‘Jaffa’ sweet orange until 2008 and this may be a tolerant variety. Symptomatic plants were observed in all other selections, prominently in ‘Tua Sr. Mamede’, ‘Grada’ and ‘Pera Vidigueira Sr. Antunes’ (mean of 56.6% and 0.81 for CVC incidence and severity score, respectively).  aClorose  aDoença de Planta  aFruta Cítrica  aOrange  aPlant diseases1 aSILVA, S. R.1 aCANTUARIAS-AVILÉS, T. E.1 aGIRARDI, E. A.1 aREIFF, E. T.  tIn: INTERNATIONAL HORTICULTURAL CONGRESS, 28., 2010, Lisboa. Science and horticulture for people: programme & book of abstracts. Lisboa: ISHS, 2010.gv. 1, p. 148. 1 CD-ROM.