| Popis: |
The research was conducted in the arboretum of the M. F. Reshetnev Siberian State University of Science and Technology (SibSU). The paper summarizes the results of the growth of mother trees and seed progeny of Ussuri plum trees growing in the introduction department of the arboretum. On average, the height of the Ussuri plum is 3.3 ±0.17 m with a high level of variation of the trait (29 %). The diameter of the stem of the studied plants is in the range from 1.5 to 5.7 cm and is expressed by a very high level of variability (51.2 %). The average crown diameter is 3.2 ±0.22 m. Among the queen trees, specimens No. 10 and No. 14 were selected by height. From these trees, the seeds were collected for sowing. As a result of a comparative analysis of the variability of annual seedlings in the height of the aboveground part of the stem and the diameter of the stem, the most promising seed progeny was identified. In the seedlings of the 2018 sowing year, the height and diameter of the stem were 12.9–1.8 cm and 10.4 and 1.6 mm, respectively. The height of the seedlings of specimen No. 14 (2019) varied from 4 to 18 cm, with an average value of 10.2 cm 0.59 and the diameter of the stem at the root neck — 1.8 cm 0.09. The obtained data are used for further reproduction and replenishment of the collection of the SibSU arboretum. When studying the size characteristics, it was noted that the minimum fruit length of the examined specimens is 1.4 cm, the maximum — 3.0 cm, the highest coefficient of variation in the specimen No. 14 is high and is equal to 22.8 %. According to the diameter of the fruit, the largest sizes are noted in specimen No. 10, the smallest — in No. 6. From five samples of Ussuri plum (No. 2, 6, 8, 10, 14), growing in the introduction department, the taste has the advantage of the sweet taste of the fruits, which are characterized by a yellow color. This should be taken into account when further breeding work with these specimens. |
