Morphological variability of phenotypic traits in of oregano samples
Laen...
Kuupäev
2020
Kättesaadavus
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
The purpose of the research was to study the morphological variability of collection
samples of oregano of the Crimean Peninsula. The experiments were carried out in 2016–2018
in the Foothill Zone of Crimea. The plant material consisted of 41 samples of origanum collected
on the Crimean Peninsula territory. The degree of identification reliability of oregano collection
samples by morphological traits was checked. The construction of relationship dendrograms was
carried out by the Ward’s method based on the Manhattan distances. It was found that qualitative
traits (coloration of corolla, leaf, bract, stalk and male fertility) showed themselves more
consistently than quantitative ones. It was recommended to use the most polymorphic traits
(entropy, H > 1.50 bits) for reliable identification of oregano samples from the Crimean
peninsula: coloration of bract, stem, leaf and corolla, as well as the number of shoots and mass
fraction of essential oil. The structure of the association differed by the years of study when
constructing dendrograms (r = 0.58).Nevertheless, a fairly clear correspondence of the clusters of
different years’ clusters to each other was established (78% of the samples). The established
correspondence indicates the reliability of the genotypes combination into separate groups
(clusters) and their similar reaction to environmental conditions. The most interesting
combinations of samples for further breeding work were identified – these are clusters 2 and 5
(according to the 2018 data). In 42.7% of genotypes from the second cluster, the mass fraction of
essential oil was at the level of 0.25–0.55% of the absolute dry mass (4–6 points). The samples
from the second cluster could be used as high-oil sources, whereas samples from fifth cluster –
as sources of high productivity of ‘green’ raw materials (up to 1,200 g plant-1
). It is advisable to
select parental forms from these two clusters for hybridization. The grouping of origanum
samples used in the work divides the samples quite accurately separated them not only on
qualitative, but also on economically valuable traits.
Kirjeldus
Märksõnad
breeding, Crimea, morphological trait, oregano, polymorphy, articles