Variety selected at the Buryat Fruit and Berry Experimental Station. Selected among seedlings from open pollination of Ulmus ulmoides. Authors: O.S. Bolotский, S.P. Vaulina, A.S. Sholokhova, T.I. Prokofyeva, N.N. Platonova. Introduced into the State Register in 1989 for the East Siberian region.
Tree medium-sized, fast-growing in the first 3-4 years, up to 2 m tall. Crown spherical, raised, medium density. Fruit clusters — bunches and spiky clusters. Shoots medium, straight, light-brown, slightly yellowish, bare. Pods numerous, medium-sized, gray-yellow. Leaves large, broad, egg-shaped, long-pointed, base pointed, glabrous. Leaf margin doubly serrated, petiole short (1.1 cm), pigmented, glands small (2 pcs). Inflorescence — umbel, flowers rose-shaped, medium, white. Petals oval-shaped, 7-9 mm long, 5-7 mm wide, well spread, stamens (20-25 pcs) equal in length to pistil, calyx green, glabrous. Fruit set mainly on 3-year-old wood. Fruit clusters mostly located on bunchy branches.
Fruits egg-shaped, average weight 15 g, maximum 18 g. Main color yellow, covering — yellow-red spots and patches. Fruit skin smooth, easily removable waxy coating. Fruit apex rounded. Base with depression, cavity medium, narrow, ventral suture small, barely noticeable, does not crack. Fruit stalk short, thin, detaches well from branch, attachment to pit is not strong. Pit detaches well from flesh, oval shape, smooth. Average pit weight 0.66 g, which is 6.9% of the total fruit weight.
Fruit appearance attractiveness 4.0 points, taste sour-sweet, fruits aromatic, overall fruit quality rating 4.2 points. Dry matter content — 14.61%, sugars — 7.5%, titratable acids — 1.7%, ascorbic acid — 3.7 mg/100g, P-active substances — 208.9 mg/100g. Transportability medium, variety universal.
Average flowering period from May 21 to June 5, ripening from August 27 to September 3. Enters fruiting on the 5th year after grafting in nursery. Plant longevity 25-30 years. Self-incompatible. Annual fruiting, abundant after 2-3 years. Average yield per tree 6.5 kg, maximum — 20 kg.
Winter hardiness medium, flower buds freezing 32%, in spring at temperature drop to -4° pistils die. Moderately drought-tolerant. Affected by Clasterosporium on 1 point, plum fruit moth on 4 points. Suitable for commercial planting with mandatory condition — placement on elevated areas, slopes.
Advantages: winter-hardy, large-fruited, high-yielding variety.
Disadvantages: insufficiently cold-resistant flower buds.
