Articles
Morphological and biochemical characteristics of the fruits of apple cultivars introduced into Troyan, Bulgaria
Article number
1449_46
Pages
341 – 348
Language
English
Abstract
The study was conducted during the period 2019-2021 for the Troyan Research Institute of Mountain Stockbreeding and Agricultire, Bulgaria with the following introduced apple cultivars: ‘Melrose’, ‘Revena’, ‘Retina’, ‘Pilot’, grafted on rootstock MM 106 and ‘Pingo’, ‘Remo’, ‘Reglindis’, ‘Gravenstein’ and ‘Rosenaisenapfel’ – on apple seedlings rootstock.
It has been established that the climatic factors in the Troyan region are changing in the direction of increasing the average monthly summer temperatures and decreasing the amounts of vegetation precipitation during the fruit ripening period. ‘Gravenstein’ and ‘Retina’ cultivars are the earliest for the region to ripen (9.08 and 23.08, respectively) and form medium-sized fruits weighing 60-80 g. ‘Pingo’, ‘Pilot’, ‘Revena’ are the latest ripening cultivars, they ripen at the beginning of October, the weight of the fruit is >100 g, they show satisfactory resistance to summer droughts.
The studied cultivars have a red main color of the skin, with interrupted or continuous streaks and green colored areas, mainly on the side not exposed to the sun.
Most cultivars have white flesh intended primarily for fresh consumption.
A correlation was found between the accumulation of dry matter in the fruit and the amount of total sugars, as well as between dry matter and invert sugar.
It has been established that the climatic factors in the Troyan region are changing in the direction of increasing the average monthly summer temperatures and decreasing the amounts of vegetation precipitation during the fruit ripening period. ‘Gravenstein’ and ‘Retina’ cultivars are the earliest for the region to ripen (9.08 and 23.08, respectively) and form medium-sized fruits weighing 60-80 g. ‘Pingo’, ‘Pilot’, ‘Revena’ are the latest ripening cultivars, they ripen at the beginning of October, the weight of the fruit is >100 g, they show satisfactory resistance to summer droughts.
The studied cultivars have a red main color of the skin, with interrupted or continuous streaks and green colored areas, mainly on the side not exposed to the sun.
Most cultivars have white flesh intended primarily for fresh consumption.
A correlation was found between the accumulation of dry matter in the fruit and the amount of total sugars, as well as between dry matter and invert sugar.
Publication
Authors
G. Popski, T. Mihova, P. Minkov, B. Stefanova, S. Todorova
Keywords
climatic factors, Malus sp., biometric indicators, sensory profile, dry matter, total sugars
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