Agronomijas v stis - Latvijas Lauksaimniecības universitāte

‘Kijevskaja Sadovaja’, and ‘Zarnica’. The high variability of fruit number in a cluster was typicalof the cultivars ‘Souzga’ and ‘Šukšinskaja’, respectively: 30.1 % and 25.4 %.Regression analysis revealed that the response of yield per bush to the amount of fruit in a clustercould be best expressed by the exponential equation y = 0.33685 × e 0.4969x at the coefficient ofdetermination R 2 = 0.895 (Fisher’s criterion F=88.4**). The relationship between the yield andmean weight of a fruit was poor and not significant while the coefficient of regression R 2 = 0.138(Fisher’s criterion F=4.8*).On the basis of the obtained results it is possible to state that the number of fruit in a cluster is onein the most important indexes for the selection of V. opulus accessions with predictable high yield.Table 1. Comparison of V. opulus accessions fruiting characteristics, 2000 – 2007AccessionMean fruit Fruit number per Stalk length of Yield, kg/bushweight, g raceme raceme, cm‘Krasnaja Grozd’ 0.51 abcd 51.0 e 3.1 ab 5.8 abc‘Kijevskaja Sadovaja’ 0.64 efgh 34.4 abc 3.8 bcde 4.1 abc‘Leningradskaja Otbornaja’ 0.66 fgh 43.1 bcde 2.9 a 8.5 c‘Zarnica’ 0.56 cdef 35.1 abcde 3.6 abcd 6.2 abc‘Souzga’ 0.54 bcde 32.3 ab 3.9 cde 2.7 a‘Šukšinskaja’ 0.45 ab 33.8 abc 3.6 bcd 3.0 a‘Zarnica-2’ 0.51 abcd 33.8 abc 4.2 de 2.6 a‘Upninkai’ 0.74 h 28.1 a 3.9 cde 4.3 bcP1 0.58 def 37.8 abcde 4.2 de 3.2 abcP2 0.56 cdef 35.0 abcde 3.2 abc 5.9 abcP3 0.47 abc 42.5 bcde 4.6 efg 6.3 abcMeans followed by the same letter in columns are not significantly different at the P=0.05 (Duncan‘smultiple range test).The evaluation of the fruits chemical composition showed that they accumulate quite large amountsof flavonols (Figure 1).The largest amount of flavonols was found in the fruits of the cultivars ‘Krasnaja Grozd’ and P1(on average about 18 mg 100 g -1 ). The lowest content of flavonols was found in the fruits of thecultivar P2 – less than 14 mg 100 g -1 .flavonols, mg/100g20151050'Zarnica''Souzga''Šukšinskaja''Krasnajagrozd'P2accessionP1'Kijevskajasadovaja'Figure 1. Amounts of flavonols in the fruits of V. opulus, accessions, 1999 – 2002The accessions were compared according to the amounts of ascorbic acid, anthocyanins,polyphenolic compounds, and benzoic acid. Statistically reliable differences were ascertained(Table 2).The fruit of different accessions accumulated from 22.9 mg 100 g -1 (P3) to 49.9 mg 100 g -1(‘Leningradskaja Otbornaja’) of anthocyanins and from 732.5 mg 100 g -1 (‘Souzga’) to 1280.0 mg100 g -1 (P3) of polyphenolic compounds. The smallest amount of anthocyanuins was noted in thefruits of the cultivar P3 (22.9 mg 100 g -1 ) and the smallest amount of polyphenolic compounds inthe fruits of the cultivar ’Souzga’ (732.5 mg 100 g -1 ). The amount of ascorbic acid content rangedfrom 13.0 mg 100 g -1 (‘Souzga’) to 44.7 mg 100 g -1 (P3).'Leningradskaja otbornaja'20