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THE BEHAVIOR OF THE ROMANIAN PLUM GENOTYPES TO ARTIFICIAL INFECTION WITH PPV (PLUM POX VIRUS

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Author(s): Ligia Ion | D. Hoza | I. Zagrai | I, C. Moale | S. Preda | V. Stoian | L. Septar

Journal: Scientific Papers of the Research Institute for Fruit Growing Pitesti, Romania
ISSN 1584-2231

Volume: XXVII;
Start page: 125;
Date: 2011;
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Keywords: Plum pox virus | plum | cultivars | breeding | resistance

ABSTRACT
Plum pox virus (PPV) is a potyvirus that causes Sharka disease in infested stone fruit trees (Prunus species, peach, apricot and plum). It causes severe losses in productivity and fruit quality in European stone fruit orchards. As PPV is transmitted by aphids in a non-persistent manner, the use of pesticides to reduce PPV dissemination is ineffective. (Atanassov D., 1932). Therefore, breeding new plum cultivars resistant or tolerant to Sharka disease is necessary for effective control of PPV in orchards and nurseries. The majority of plum cultivars show different level of susceptibility to PPV. The Romanian cultivar “Andreea” belongs to highly tolerant plum cultivars: only few symptoms are observed on leaves and virus particles are present in plant tissues in low concentration (Zagrai I. et al. 2005). Also the study of local plum genotypes concerning the resistance to PPV, is an important precondition for improvement a new breeding program in plum.
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