Uman NUH | today: 05/17/2023

Polyvariation of the genus Thuja L. members in the cultural fitolandscapes of Volyn-Podillya

Author(s) Tsytsyura N., , ,
Halahan O., , ,
Category The Agronomy
year 2014 issue Issue #84
pages 83-90 index UDK 582. 477. (477.8)
Abstract Taxonomical review of the genus Thuja cultural fitolandscapes of Volyn-Podillia was made. Morphological and bio-ecological characteristics of the species Th. occidentalis, Th. plicata, Th. koraiensis, Th. standishii, Th. sutchuensis were given and the habitat of the oldest taxons of Volyn-Podillia was pointed. Polyvariation of the form content of Th. occidentalis, Th. plicata was investigated and its classification was conducted. Was found that super group A (juvenile forms, needles) is represented by two taxons (4,4%), supergroup B (transitive forms, needles of intermediate type) – by 3 taxons (6,7%), supergroup V (scale-like needles) – by 40 taxons (88,9%). Growth group – 25 forms (62,5%), colour-growth group – 4 forms (10%), colour – 11 forms (27,5%). There are 8 forms of big growth (27,6%), 7 – of middle height (24,1%), 14 – of low height (48,3%). There are 15 forms with deviations in crown shape (51,7%), 14 forms with deviations in crown shape and structure of sprouts (48,3%). Summarizing the above mentioned materials about investigating the genus and form content of Thuja species, we can suppose that in the conditions of culture genetic potential of the genus Thuja is revealed in the direction of external change of the life form of plants. Therefore, enrichment of species’ form content of the genus by the introduction and use of methods of their rapid reproduction is suggested to be promising and practical in landscape gardening construction.
Key words genus Thuja, polyvariation, juvenile, transitive, growth, color, color-growth forms
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