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FRUIT QUALITY OF TWO PLUM CULTIVARS GRAFTED ON ‘DOCERA 6’ (PRUNUS DOMESTICA L. X PRUNUS CERASIFERA EHRH.) ROOTSTOCK

Published in Scientific Papers. Series B, Horticulture, Vol. LXVI, Issue 1
Written by Marieta NESHEVA, Vanya AKOVA, Nesho NESHEV

The most commonly used rootstock for plum cultivars in Bulgaria is the seedling P.cerasifera Ehrh. In studies concerning the resistance of some rootstocks to the Plum Pox Virus, good results were obtained for the clonal rootstock 'Docera 6 '. Considering that plum fruit quality depends mainly on the scion genotype, but could be influenced by the rootstock as well, the objective of the current study was to evaluate the fruit quality of the plum cultivars 'Jojo’ and 'Topgigant Plus’, when grafted on 'Docera 6’. The same cultivars grafted on the seedling rootstock P. cerasifera were used for comparison. The trees were planted in 2016 at the Fruit Growing Institute of Plovdiv, Bulgaria. In 2020-2021 fruit biometrical data, fruit flesh firmness, TSS (°Brix), skin colour and fruit flesh colour were measured. For evaluating the consumer acceptance and nutritional value of the fruits, sensory and chemical analyses were performed. All of the studied parameters were significantly influenced by the cultivar. The largest fruits were measured for the combination Topgigant Plus/Docera 6 (71.53 g). The content of sugars and organic acids were the highest in ʻJojoʼ fruits.

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