Evaluation of fruit quality of ‘Navelina’, ‘Lane Late’ compared to ‘Thomson’ Novel oranges on Citrumelo and C۳۵ rootstocks during cold storage

Purpose: Citrus is one of the most important horticultural products in Iran. Fruit quality is usually influenced by variety, rootstock, and postharvest conditions. Therefore, this study was carried out to determine the fruit quality and storability of three orange cultivars on two rootstocks. Research method: Fruits of Navelina, Lane Late, and Thomson Novel on two rootstocks (Citrumelo and C۳۵) were harvested when the TSS/TA ratio reached about ۶.۵-۷. Fruit quality characteristics were evaluated at harvest and in cold storage (۵°C, RH=۸۵%) for ۶۰ days. Findings: The fruits of all three cultivars on both rootstocks had arithmetic, geometrical, and homogenous diameter values close to the equivalent diameter value. The weight loss of ‘Lane Late’ was higher than the ‘Thomson’ and ‘Navelina’ fruits on both rootstocks during storage. ‘Navelina’ fruits on Citrumelo had reserved more juice percentage during storage. The TSS/TA index was lower in ‘Lane Late’ compared to the other cultivars on both rootstocks. A decrease in ascorbic acid was observed during storage. The peel greenness (a*=-۱۰.۵۳) was the lowest at ‘Lane Late’ fruit grafted on C۳۵. The best CCI index was observed in ‘Navelina’ peel on both rootstocks. ‘Lane Late’ had the lowest antioxidant capacity on C۳۵ (۵۹.۲۶%) and more antioxidant capacity (۷۱.۵%) on Citrumelo. Based on the sensory evaluation, ‘Navelina’ and ‘Thomson’ scored more points regarding the appearance and aroma of the C۳۵ rootstock. Research limitations: No limitations were found. Originality/Value: The ‘Navelina’ has good color, good storage quality, and is early ripening. ‘Lane Late’ is a late ripening variety that is slow to de-green and is not suitable for cultivation in the north of Iran.

کلیدواژه ها:

adaptation ، citrus ، Novel variety ، Storability