Condiciones de cultivo de la planta matriz y uso del ácido indolbutírico en la propagación del mandarino 'Sunki' por estaquilla

• Autor(a) principal: Sarmiento, Andres Ivan Prato
• Data de Publicação: 2016
• Outros Autores: Schwarz, Sergio Francisco, Souza, Paulo Vitor Dutra de
• Tipo de documento: Artigo
• Idioma: spa
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/175010
• topic: Propagação vegetativa; Tangerina; Fruta cítrica; Regulador de crescimento; Citrus sunki; Growth regulators; Rooting; Rootstocks; Citrus sunki; Enraizamiento; Fitorregulador; Patrón

Citrus rootstocks are obtained from seeds, selecting the apomitic seedlings. However, there is risk of not making the correct selection, due to low level of polyembryony and high heterozygosity in some species or cultivars, such as ‘Sunki’ mandarin. Therefore, obtaining the citrus rootstocks through cuttings may solve the problem. The objective of this study was to evaluate the potential of rooting semi-hardwood cuttings of ‘Sunki’ mandarin (Citrus sunki Hort. ex Tan), collected from mother plants cultivated on the field or in a greenhouse, using different concentrations of indolbutyric acid (IBA). Cuttings were collected in late spring and maintained for 90 days under greenhouse mist system. Completely randomized block design was used, with four replications in a factorial 2 x 4, concerning to two culture conditions (mother plants cultivated on the field and in a greenhouse) and four concentrations of IBA (0, 750, 1.500 and 3.000 mg L-1). The rooting of ‘Sunki’ mandarin was high, reaching 96% in both conditions of culture. The sprouting (53%) and survival (95%) of the cuttings showed satisfactory values, regardless of the IBA. The use of IBA is only necessary in cuttings originated from plants kept in greenhouse, improving rooting and number of roots.