Agronomijas v stis - Latvijas Lauksaimniecības universitāte

characteristics under study have shown a high level (V > 30 %) of variability indicating the highestdegree of varietal distinctions.Table 1. Averaged quantity indicators of the biochemical structure of fruits (dry weight) andvariation coefficients in a long-term cycle of supervision for a varietal row of Vacciniumcorymbosum L.2006 2007 2008PeriodIndex mean V, % mean V, % mean V, %averageV, %Soluble solids, % of freshfruit13.9 12.8 13.9 10.1 14.1 12.1 11.7Free organic acids, % 5.7 36.4 3.8 45.7 6.7 39.1 40.4Ascorbic acid, mg % 601.2 20.3 426.6 26.3 604.8 30.3 25.6Glucose, % 5.34 16.4 4.49 15.8 4.96 27.5 19.9Fructose, % 18.74 2.9 14.22 3.9 7.26 22.3 9.7Sucrose, % 3.19 19.8 2.08 20.2 0.56 22.1 20.7Sum of soluble sugars, % 27.25 4.1 20.79 5.1 12.79 6.8 5.3Fructose/ Glucose 3.6 19.2 3.2 16.5 1.7 46.0 27.2Monose/Disaccharide 7.9 19.4 9.4 19.8 22.7 21.5 20.2Sugar-acid index 5.4 31.2 6.5 39.5 2.5 75.9 48.9Hydropectin, % 1.98 24.3 2.18 23.8 2.37 18.0 22.0Protopectin, % 3.45 22.4 2.60 19.8 3.35 21.0 21.1Sum of pectins, % 5.43 16.5 4.77 19.2 5.71 17.8 17.8Protopectin/Hydropectin 1.8 33.8 1.2 22.9 1.4 17.1 24.6Anthocyanins, mg % * 7.6 45.1 2.0 91.5 17.1 35.5 57.4Leucoanthocyanins, mg% 17.4 23.2 12.1 20.6 24.1 29.1 24.3Sum of anthocyanicpigments, mg %25.0 19.7 14.1 21.5 41.2 27.1 22.8Catechines, mg % 984.3 20.2 923.4 27.6 570.1 15.4 21.1Flavonols, mg % 1766.6 5.5 1626.0 11.0 1890.6 12.2 9.6Flavonols/Catechines 1.9 27.1 1.9 36.3 3.4 20.9 28.1Sum of bioflavonols, mg % 2776.0 6.9 2563.5 11.7 2501.8 9.2 9.3Phenol-carboxylic acids,mg %781.4 18.0 800.3 24.4 787.3 24.3 22.2Benzoic acid, % 1.15 6.1 1.11 18.2 1.18 14.3 12.9Tannins, % 1.21 19.5 1.72 23.2 1.83 16.3 19.7Fat oils, % 3.61 29.9 3.17 13.0 3.25 21.9 21.6Nitrogen, % 0.76 15.1 0.91 16.2 1.10 10.3 13.9Phosphorus, % 0.17 24.0 0.14 11.5 0.14 13.0 16.2Potassium, % 0.53 10.0 0.57 8.7 0.76 11.3 10.0Calcium, % 0.31 10.0 0.42 4.9 0.40 4.9 6.6Magnesium, % 0.09 11.9 0.08 8.8 0.11 6.8 9.2* mg% - mg of substance in 100 g of dry weight of sample.The variability level of a particular characteristic only in some cases remained stable throughoutthe whole 3-year period of observation. For example, such stability of a low variability level wastypical for the parameters of the accumulation of solid, flavonols, potassium, calcium, magnesium,the total amount of sugars and the sum of bioflavonols in fruits whereas the parameters of theaccumulation of fructose, benzoic acid, fat oils, nitrogen and phosphorus in fruits were notable forlow variability only during one or two seasons. Similarly, the high level of genotypic variabilityduring the whole period of observation was typical for the parameters of the accumulation of freeorganic acids, anthocyanins and the values of a sugar-acid index whereas for the ascorbic acidcontent it has been notable only in 2008. Moreover, even within a particular area of variability ofthe characteristics analyzed there have been identified some essential interseasonal distinctions.This fact unequivocally indicates a dependence of the genotypic variability of quantity indicators ofbiochemical composition of Vaccinium corymbosum L. fruits on the hydrothermal mode of itsformation period.106