Resistance of advanced sweet cherry selections and cultivars to fruit surface pitting
F. Kappel, P. Toivonen
ISHS Acta Horticulturae 667:515-522
2005
บทคัดย่อ
Fruit of 15 selections and cultivars were harvested when judged to be commercially ripe. Fruit were held at 4°C for 4 h and then injured by dropping a 10 g weight, with a 2.43 mm diameter head, 6 cm onto individual fruit. The injured fruit were stored in polystyrene clamshell containers at 1°C for 14 days. Fruit samples were weighed at harvest and after storage to determine weight loss. Fruit were then rated visually for severity of pitting using the following scale: 4=none; 3=slight; 2=moderate; and 1=severe. Impressions of the pits were made and stored in glass vials that were flushed with N2 before sealing and storage at room temperature. The diameter, depth, and area of the pit were measured from the impressions using an image analysis system that consisted of a dissecting microscope with a video camera.
‘Symphony’ was the most resistant cultivar to pitting, based on visual evaluations, depth of pit, pit diameter, and area of pit. The selection 13N-06-49 was the least resistant, with the poorest visual rating and largest pits. ‘Lapins’, ‘