Local late-winter variety of quince, a folk selection from Dagestan, originating from the village of Zubutli in the Kazbekovsky district of the Republic of Dagestan. Approved for the North Caucasus region. Widely distributed in the plain and foothill zones of Dagestan.
Medium-sized tree; crown shape is high-rounded in young trees, spherical in fruiting stage; fruiting type — on one-year growth, fruiting spur, fruiting branch.
Buds of medium length and thickness, dark brown. Leaves large, surface wrinkled, margins entire, petiole short and thick, stipules absent.
Fruits very large, average weight 350 g, maximum 800 g. Fruit shape round, bluntly ribbed, surface smooth. Skin color golden-yellow, shiny. Absence of bloom and waxy coating; fruits have woolly hairs. Fruit stalk-long, thick; calyx large, closed, often half-open; subcalyx tube medium-sized, usually cup-shaped; seed chambers large, closed; seeds medium, brown; central cavity very large.
Flesh light-yellow, juicy, free of stone cells, pleasant taste, fruits suitable for high-quality canned goods.
The variety is distinguished by rich chemical composition of fruits: dry matter — 15.7%, total sugar — 9.6%, acidity — 1.07%, ascorbic acid — 18.3 mg/100g, pectin substances — 1.1%, tannins — 0.09%.
Fruit bearing starts at 5-6 years, annual fruiting, yield 150-180 centners per hectare. Ripening period late-winter, harvest from November 1 to November 15. Fruit storability and transportability good.
Winter hardiness of trees and fruit wind resistance high. Variety resistant to fungal diseases and pests.
Like Ktyun-zhum, the variety can be propagated by three methods — layering, root suckers, and budding. Rootstock trees grow well, fruit longer, and are more durable.
Advantages of the variety: large fruits with good storability and transportability, high yield, winter hardiness, disease resistance, wind resistance.
Disadvantages of the variety: not very high taste quality of fruits.
The Zubutlinskaya variety is one of the best sources for creating high-yield, large-fruited late-winter quince varieties with good storability, transportability, rich biochemical composition of fruits, high winter hardiness, and disease resistance.
