Altai Jubilee

This variety was developed at the M.A. Lisavенко Institute of Fruit Growing in the mountainous Altai region (Chemal village) by selecting seedlings from open-pollinated 'Manchurian' plums. The paternal form was likely the 'Immun' variety (Primorsky x Shiro). Breeders: V.S. Putov, N.N. Tikhonov, T.M. Pletneva (Tsypetsavera). The most valuable among Altai selections, widely grown in gardens of Western Siberia, the Southern Ural, Krasnoyarsk region, and northern Kazakhstan. Included in the State Register in 1974 and approved for use in the West Siberian, East Siberian, and Ural regions.

Trees are medium-sized with medium-density, broadly pyramidal crowns. Main fruiting type — cluster branches. Branches are brown-gray, emerging from main branches at acute angles. Low trunk. Shoots are straight, thick, reddish-brown, with few, large stipules. Buds have prominently protruding large axillary bases. Vegetative buds are conical, fruiting buds are rounded. Leaves are large, 12.5 cm long and 7 cm wide, broadly ovate, light green, dull, reddish at shoot tips, slightly hairy along shoots. Leaf blade has a wedge-shaped base, hairless, slightly folded like a boat, with slight folding along the main vein and inwardly curled doubly serrated edges, with an acute, curled tip. Petiole is medium length, dark anthocyanic in color. Each bud contains 2-3 flowers, blooming before leaves. Flower corolla is cup-shaped, buds white. Petals are white, oval, large, 8 mm wide and 11 mm long, with uneven surface and wavy edges. Stamens 16-20, stigma positioned below anthers. Sepals are narrowly ovate with downward-curled edges.

Fruits are angular-oval with a well-defined ridge, deep depression, weight 14-16 g, height 28 mm, diameter 28 mm. Main color is yellow-orange with bright red blush, vividly visible through a whitish waxy coating. Pedicel is short, easily separates from fruit. Skin is smooth, not bitter. Flesh is yellow-orange, loose, juicy, aromatic, good taste. Stone is fairly large, well-formed, oval, smooth, easily separates from flesh. Fruits contain 19-20% dry matter, 10-12% sugars, 1.4-1.7% titratable acids, 0.6-0.8% tannins, 6-7 mg/100g ascorbic acid, 280-300 mg/100g P-active compounds. Universal use.

Fruits ripen mid-August or in the third decade. Enters fruiting on the 3rd-4th year after planting as one-year seedlings. High yield, but fruiting is irregular. Winter hardiness of trees is high, fruit buds are satisfactory. Fruit transportability is weak. Relatively resistant to Clasterosporium, insufficient drought tolerance, develops chlorosis on carbonate soils. Moderately damaged by fruitworm and bird cherry aphid, severely by Maslov's seed bug. Not resistant to rot. Self-sterile.

Advantages of the variety: high potential yield, good fruit taste.

Disadvantages: not resistant to rot, severely damaged by seed bug.