Mavra

Hybrid from crossing of form No. 1-5-13 of Viburnum betulifolium with form No. 5-28-10 of Viburnum trilobum. Originator — Central Siberian Botanical Garden, SB RAS. Authors: V.S. Simagin, V.P. Belousova, O.V. Simagina. Introduced into the state register since 2002 for the West Siberian region.

Tree 6-7 m tall with a broad-pyramidal crown, densely foliated. Bark grayish, rough. Shoots directed upward, brown, medium thickness, straight; lenticels numerous, grayish-brown. Vegetative buds medium, narrowly oval; generative buds oval-egg-shaped, pressed against the shoot. Leaf elliptical, medium, 7.5 x 4 cm, dark green, apex sharply pointed, base rounded, margin finely serrated, no pubescence; leaf blade flat, slightly curved downward; glands 3-4, medium, yellow, bean-shaped; petiole 2 cm long, thin, green. Flowers in dense racemes, 13-14 cm long, 35-40 flowers, flower diameter 15 mm, corolla saucer-shaped, petals closely folded, white, oval-rounded, stigma slightly higher than anthers, calyx wide-bowled, calyx lobes unnotched; stamens about 20, 4 mm long, stigma 6 mm long. Flowering on one-year-old shoots.

Fruit mass 0.6-0.7 g, height 7.5 mm, width 7.5 mm, thickness 7.4 mm, round; cup wide and shallow; apex rounded. Skin color black, solid, at full maturity. Flesh greenish-yellow, with burgundy veins, tender, juice red. Pedicel 0.8 cm long, thin. Stone egg-shaped, smooth, mass 0.08 g, 12% of fruit mass, apex pointed, base rounded, good separation from flesh.

Fruits are uniform, attractive. Flesh juicy. Taste sour-sweet with astringency, good, 4.6 points. Detachment from pedicel medium. Suitability for mechanical harvesting medium. Resistance to fruit cracking high. Universal-purpose variety. Fruits suitable for drying, compote, and juice production. Fruits contain 31.1% dry matter, 14.25% sugars, 1.22% free acids, 10 mg/100g ascorbic acid.

Flowering in mid-late period, in Novosibirsk — end of the third decade of May. Ripening mid-late, synchronized, beginning of August. Enters fruiting on 3-4 years after planting two-year-old saplings. Propagated by green cuttings and grafting. Tree lifespan about 30 years. Variety weakly self-fertile, well pollinated by other selected Viburnum varieties from the Central Siberian Botanical Garden with similar flowering periods. Yield 23-28 kg per tree, at planting density 5 x 3 m, 150-160 c/ha.

Tree, shoots, and generative buds highly resistant to winter frosts. Flowers weakly resistant to spring frosts. Drought and heat resistance medium. Resistance to coccomycosis, clasterosporiosis, and moniliosis high. Resistance to bacterial, viral, and mycoplasma diseases not studied. Resistance to gummosis and chlorosis medium. Slightly affected by aphids, scale insects, and cherry slugs, heavily affected by viburnum slugs and hawthorn.

Advantages of the variety: high winter hardiness, good taste and technological qualities of fruit, high and stable yield.

Disadvantages of the variety: medium fruit size, dense crown.