Abstract
The study of the content and ratio of starch and fat in the shoots of the seed progeny of Siberian larch (Larix sibirica Ledeb.) shoots during its reintroduction to the Nizhny Novgorod region was carried out. The objects of the study were located in the arboretum of the Nizhny Novgorod State Agricultural Academy with geographical coordinates — 56°14'32,7"N 43°57'20,7"E and an absolute height — 178 m. The experimental site is assigned to the zone of coniferous-broad-leaved forests and is included in the area of coniferous-broad-leaved (mixed) forests of the European part of the Russian Federation. The work took into account the principle of the only logical difference, the representativeness of the samples, and the requirements for the typicality, suitability, and reliability of the experience. Ten accounting trees with modal development characteristics were examined in the field. From them, 10 normally developed shoots were harvested without signs of damage by external factors. To determine the content of spare substances, laboratory methods of histochemical analysis were used. Phenotypic differences between individuals of seed origin in the content and balance of spare substances were revealed. The highest content of starch and fat (19,20 ± 0,52 points) was observed in tree No. 2, and the lowest-in tree No. 4 (12,95 ± 0,37 points). The average value generalized for the entire data set was 15,88 ± 0,30 points. The hereditary conditionality of intraspecific variability of Siberian Larch for all tested characteristics of spare substances is established. The highest estimates of the heritability coefficient (64,12 ± 3,59 %) were observed for the total total content of starch and fat, the lowest (49,99 ± 5,00 %) — according to the estimates of the share of starch and the share of fat in the formation of their total stock. The conclusion is made about the control on the part of the genotype over the physiological state of Siberian larch trees of seed origin, and about their intraspecific polymorphism. The prospects of selection from their number of individuals whose physiological status most fully corresponds to the existing conditions of growth are proved.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
