Abstract
Thus, as a result of biochemical screening of 30 taxons of Ericaceae species taking into account 32 parameters in a long-term cycle of observation it has been established the different degree of dependence of variability level of biochemical structure components of fruits of alien crops on genotype and a hydrothermal mode of the period of their maturing has been revealed. The similarity of parameters of genotypic variability of some traits of all investigated Ericaceae species is also revealed: low one – for the general contents in fruits of soluble sugars, flavonols, of potassium, calcium, magnesium and high one – for the contents of anthocyanins, and also the ratio of fractions of pectinaceous substances and bioflavonoids. Specific features of genetic determinacy of the analyzed traits, testifying the greatest degree of its displays of V. corymbosum for total accumulation of soluble sugars and bioflavonoids, flavonols contents, calcium and magnesium and by the lowest degree – for the contents of titratable acids, vitamin C, anthocyanins and values of a sugar-acid index were established. If to mention V. vitis-idaea L., the parameters of general accumulation in fruits of soluble sugars, dry substances and all major mineral elements were characterized by the greatest degree of genetic determinacy, whereas by the least degree – the contents of anthocyanins, catechines and tannins. If to mention V. macrocarpon, the parameters of accumulation in fruits of dry substances, nitrogen, potassium, calcium, phenol-carboxylic acids have been noted by the most expressed genetic determinacy, and by the least expressed – the contents of anthocyanins, sucrose and pectinaceous substances in fruits.
Highlights
The major aspect of the introduction of researches connected with the in-depth study of berry plant species is the complex estimation of biochemical structure of fruits, which gives us the representation about the contents of a wide spectrum of useful substances in fruits
Last years the collection fund of Central Botanical Garden of the NAS of Belarus was replenished with new taxons of 3 Ericaceae species (V. corymbosum, V. vitis-idaea and V. macrocarpon)
Weather conditions during the most active maturing period of fruits of Ericaceae species in July-September differed within the observation by strongly expressed intra- and inter-seasonal contrasts what created the inadequate preconditions for the formation of biochemical structure of fruits
Summary
The major aspect of the introduction of researches connected with the in-depth study of berry plant species is the complex estimation of biochemical structure of fruits, which gives us the representation about the contents of a wide spectrum of useful substances in fruits. At the same time it is well-known, that accumulation parameters of the substances depend on genotype what determines distinctions of species of organoleptic properties of berry production. Last years the collection fund of Central Botanical Garden of the NAS of Belarus was replenished with new taxons of 3 Ericaceae species (V. corymbosum (a highbush blueberry), V. vitis-idaea (lingonberry) and V. macrocarpon (large cranberry)). It gives additional opportunities for the assortment expansion of the varieties offered for the division into districts and breeding on the basis of revealing most perspective of them according to plant and bioproductive characteristics, and nutritious and vitamin value of berry production defined by its biochemical structure peculiarities. At the same time it is logical to assume the existence of genotypic distinctions of accumulation parameters in fruits of the separate chemical compounds specifying the degree of their genetic determinacy indirectly, allowing designate the characteristics possessing the highest and lowest stability at breeding new varieties.
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