Study of Bearing Status and Fruit Quantity and Quality Traits in Some Apricot Cultivars in Karaj Condition

In this research, bearing status and fruit quantity and quality traits in some apricot cultivars in Karaj condition were studied. Flowering time range was one week. The percentage of pollen germination (50.4-80.8 %), pistil length (5.24-9.13 mm), ovary diameter (0.96-1.83% mm) and double pistils (0-31 %), Initial fruit set (0.3-38.8 %) and finally fruit set (0.1-30.5%) were obtained. Also, ripening time range was 35 days and fruit development (86-118 days) and yield of cultivars (3-38.3 Kg tree-1) were attained. The studied cultivars were round in shape and their fruits weight range was 24.5-51.8 g. The stone weight included a lower percentage of fruit weight (3.3%) in the ʻAmeneh Dizbadʼ. The skin hue angle was obtained as 85.1-99.5 degrees. The highest TSS (19.47˚ Brix) was observed in the ʻShahroodiʼ. All cultivars had a low TA (<0.7%). The pH juice range was 4.6-5.9. Antioxidant capacity (22.53-28.53 %), vitamin C (6.37-20.53 mg 100ml-1 Juice), and total phenol (176.62-330.31 mg GAE 100g-1 FW and flavonoid contents (3.21-5.57 mg Q 100g-1 FW) were obtained. Fruits of ʻAmeneh Dizbadʼ, ʻShahroodiʼ, and ʻRajabaliʼ were among superior cultivars that seems to be good for fruit production in Karaj conditions.