Black Swan

Medium-ripening variety, obtained at the Mountain Horticulture Department of the Siberian Institute of Horticulture named after M.A. Lisavenko from crossing the form (Golubka seedling x Slozhnokistnaya) with the variety 'Zagadka'. Author: L.N. Zabelina. Included in the State Register of Varieties in 2007, approved for use in the West Siberian region.

Strong-growing, compact bush of medium density. Growing shoots of medium thickness, straight, green with pink stripes, slightly hairy, woody shoots of medium thickness, gray-brown, slightly hairy. Buds of medium size, single, egg-shaped, slightly pointed, red, slightly hairy, pressed (deviated only at the base of the shoot), terminal non-free.

Three-lobed leaf, medium size, dark green, without hairs, slightly wrinkled, medium density, slightly curved along veins, shiny, blade positioned nearly parallel to the shoot. Central lobe longer than lateral ones, margins slightly uplifted. Angle between main veins of lateral lobes is straight or acute. Basal lobes well developed, veins directed towards leaf apex. Leaf base with small, open notch. Teeth of medium length, small, with white "tips". Color of main veins light green. Leaf petioles of medium length and short, thin, hairy, dirty-purple, red-magenta in autumn, positioned at an acute angle (45°) to the shoot.

Flowers medium-sized, calyx lobes pink, corolla petals cream-colored, not closed, deviated. Inflorescences of medium length (5-7 cm) and thickness, medium density, green. Pedicels of medium length, green, without hairs.

Berries large (1.6-3.0 g), one-dimensional, tear-shaped, black, slightly shiny, with moderate number of small, elongated, light-brown seeds, medium skin, elastic, with easy, dry detachment, taste sour-sweet, pleasant. Receptacle small. Chemical composition: dry matter — 13.2%, total sugars — 7.9%, titratable acidity — 2.7%, ascorbic acid — 92.4-107.0 mg/100 g, pectin — 0.9%.

Winter-hardy, self-fertile, resistant to fungal diseases and bud mite, productive (7.1-12.3 t/ha).

Advantages of the variety: compact bush, good taste and berry technology, resistance to fungal diseases and bud mite.

Disadvantages of the variety: susceptible to freezing in severe winters.