Original scientific paper
https://doi.org/10.5513/JCEA01/22.4.3295
Sanitary selection of sour cherry cv. Marasca (Prunus cerasus cv. Marasca) in Croatian largest plantation “Vlačine”
Josip RAŽOV
; Syngenta Agro d.o.o., Radnička cesta 180, 10000 Zagreb
Silvio ŠIMON
; Directorate for the Professional Support for the Development of Agriculture and Fisheries, Ministry of Agriculture of the Republic of Croatia, Zagreb, 10010, Croatia
Ivana KRIŽANAC
; Croatian Agency for Agriculture and Food, Centre for Plant Protection, Gorice 68b, Zagreb, 10 000, Croatia
Darko VONČINA
; Centre of Excellence for Biodiversity and Molecular Plant Breeding, Svetošimunska cesta 25, Zagreb, 10000, Croatia
Abstract
Sour cherry cv. Marasca is considered a native Croatian variety with the best fruit quality in the Northern Dalmatia region. The current production is not sufficient to cover the demand, therefore new orchards should be established with pathogen-tested planting material. To select virus- and bacteria-free mother trees, a survey was conducted in the largest Croatian Marasca plantation "Vlačine". ELISA on 205 trees (51 elite, 103 average, 51 below average) confirmed the presence of prunus necrotic ringspot virus (PNRSV) on 101 trees (49.3%); petunia asteroid mosaic virus (PeAMV) and prune dwarf virus (PDV) on 10 trees each (4.9%); raspberry ringspot virus (RpRSV) on 7 trees (3.4%); cherry leafroll virus (CLRV), arabis mosaic virus (ArMV) and plum pox virus (PPV) on 3 trees each (1.5%); and apple mosaic virus (ApMV) on 1 tree (0.5%). For PNRSV, significant ELISA detection sensitivity was found, with twigs in dormant period as more reliable virus source compared to leaves during the growing season. In addition, six trees were positive on little cherry virus 2 (LChV-2) by RT-PCR. Along with very frequent latent infections, following symptoms were observed during pre-harvest period: yellow spots on leaves (ApMV); yellowing, stunted growth, leafless twigs with leaves only at the tip (PDV), bark splitting (PeAMV), reduced leaf size (RpRSV), chlorotic/necrotic ring spots (PNRSV), and uneven fruit ripening (LChV-2). Eleven trees were free of all viruses and bacteria defined by EPPO cherry certification scheme, including PPV. The selected virus- and bacteria-free elite trees represent a valuable genetic source for propagation and further clonal selection.
Keywords
ELISA; RT-PCR; symptoms; viruses; bacteria
Hrčak ID:
268106
URI
Publication date:
22.12.2021.
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