Agronomijas v stis - Latvijas LauksaimniecÄ«bas universitÄte

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Figure 1. Number of flowers produced by the different clonesin the years 2006, 2007 and 2008.Figure 2 shows the berry production of the clones. The results are surprising based on flowerproduction as the clones that produced the most flowers would be expected to produce mostberries. In this case, the three clones that produced most flowers have a very low production ofberries. The three clones that produced the most berries, clones 002, 102 and 208, all hadintermediate flower production.Figure 2. Number of harvested berries produced by the different clonesin the years 2006, 2007 and 2008.Table 2 combines the results for the number of flowers and the number of berries and shows thenumber of registred flowers per harvested berry. In general, most clones show similar results,ranging from 1,88 to 2,90 flowers per berry over the three years. Three clones deviate from this.Clones 104, 106 and 404. Again, these are the clones that produced the most flowers and lessberries.Based on the registrations on flowering, the clones with high numbers of flowers per producedberry do not seem to be neither particularly late nor early flowerers and it also seems that therewere male flowers available at the time of flowering. Thus, deviating flowering times do notexplain the small amount of berries produced from the abundance of flowers, but as flowering isregistered only once per year it still may be that some tendencies that the registered data are notshowing up.In this case there were 6 different male clones available for pollination. It may be that the femaleclones with low berry production combine poorly with the available male clones, which mightexplain the low production.124
Table 2. Number of flowers per harvested berry for the different clones in the years 2006, 2007 and2008.Clone 2006 2007 2008 Totally002 2,26 1,16 2,72 2,04102 2,88 2,07 2,56 2,45104 15,63 32,11 41,29 24,31106 92,00 63,25 389,00 112,22202 2,52 1,57 2,73 2,41206 2,37 1,39 3,61 2,34208 4,05 2,68 3,02 2,98304 2,93 1,69 2,38 2,34306 3,48 1,30 1,98 1,88404 15,54 27,11 73,33 26,64602 4,29 2,03 3,12 2,90The northern clones might be expected to be best adapted to the environmental conditions inTromsø. However, the clones with the highest berry production all had a southern origin. At thesame time other southern clones produced few berries, so there were no obvious tendenciesconcerning origin when berry production was considered. For flower production, the three clonesfrom Aust Agder (102, 104 and 106) all produced above average, while the clones from Nordlandand Hedmark produced at different levels. In total, origin did not explain the variations inproduction.Based on these evaluations, selection based on the number of flowers and the number of pistils maytheoretically entail a risk of selecting genotypes with high potential, but low ability for productionunder certain environmental conditions. Thus, there may be genotype-environment interactionsinvolved, such that specific genotypes are adapted to specific environmental conditions. Moreknowledge about the genetic and environmental basis for berry production is needed to find theoptimal selection criteria. The genotypes evaluated here are also planted at different natural sites inNorway. Registrations from these sites may provide additional information about the differentgenotypes and environmental factors influencing berry production.Further evaluations will be done before the selection of new cultivars for release. In addition toproduction traits, the new selection criteria most likely will include berry contents, such as the levelof antioxidants.References1. Rapp K. (1991) Selection for high berry yield and development of varieties of cloudberry (Rubuschamaemorus L.). Norsk Landbruksforskning, 5, pp. 359-367.FUNGAL DISEASES OF VACCINIUM MACROCARPON IN LATVIAVACCINIUM MACROCARPON SLIMĪBAS LATVIJĀLiga Vilka, Regina Rancane, Maija EiheLatvian Plant Protection Research Centre, Lielvardes 36/36, Riga, LV – 1006, Latviae-mail: regina rancane@laapc.lvAbstractThe American cranberry (Vaccinium macrocarpon Ait.) has been known for fifteen years, butfungal diseases have been investigated only last years in Latvia. Upright dieback and berries rotwere observed several years ago, but growers did not know the causal agents of these symptoms.The aim of the study was to detect the causal agents of cranberry diseases in Latvia. Samples ofupright dieback (in summer) and berries (during the harvesting) from different regions of Latviawere collected for causal agent detection. Botrytis cinerea, Fusiccocum putrefaciens, Phomopsisvaccinii, Pestalotia vaccinii, Discosia artocrea, Physalospora vaccinii were detected from upright125
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Conference Organizing CommitteeChai
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15 Pormale J., Osvalde A. and Nolle
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were established in 1985. Nowadays,
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10,1-15 ha7%15,1-20 ha7%< 20,1 ha0%
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In less than half the surveyed farm
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economical and biochemical characte
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investigated European cranberry acc
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fruit of V. opulus has different am
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As several authors have stated (Koz
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KopsavilkumsVaccinium ăints kultū
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maintained in a mist chamber with v
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period and produce vigorous vegetat
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38. Marcotrigiano M. and McGlew S.P
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of changes in the typological struc
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fall from 2 to 3 and that for heath
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HIGHBUSH BLUEBERRY BREEDINGAUGSTKR
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Southern and Intermediate highbush
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and anatomically they belong to fal
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The levels of flavonols are more co
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21. Polashock J.J., Griesbach R.J.,
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Figure 1. A general scheme of the N
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5. Åkerström A., Forsum Å., Rump
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species and studying the efficiency
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Thus, it has been determined that t
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CHEMICAL COMPOSITION OF HIGHBUSH BL
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lueberry cultivars were collected f
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Ascorbic acid, mg 100ḡ 112108642a
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6. Saftner R., Polashock J., Ehlenf
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Materials and methodsThe experiment
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The titrable acids content of the e
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There was a significant correlation
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Nichenametla et al., 2006), human n
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The contribution of V. macrocarpon
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11. Kong J. M., Chia L. S., Goh N.K
Page 73 and 74: isothermically at 70°C for 5 min,
Page 75 and 76: IN VITRO PROPAGATION OF SEVERAL VAC
Page 77 and 78: 16BM ean N o. of shoots/explant1412
Page 79 and 80: Figure 2. Axillary shoot regenerati
Page 81 and 82: evaluate the blueberries supply wit
Page 83 and 84: espectively). It should be stressed
Page 85 and 86: lueberry appear to play a conclusiv
Page 87 and 88: 15. Reimann C., Kollen F., Frengsta
Page 89 and 90: each type, and for comparison sampl
Page 91 and 92: the mean. Kisgyır 1 sample has the
Page 93 and 94: 13. Porpáczy A. (1999) A húsos so
Page 95 and 96: was medium (0.014 - 0.017 g kg -1 s
Page 97 and 98: ‘Salaspils Ražīgā’. Vigorous
Page 99 and 100: KopsavilkumsEiropas melleĦu (Vacci
Page 101 and 102: Figure 2. Chemometric PCA of 32 blu
Page 103 and 104: References1. Baloga D.W., Vorsa N.,
Page 105 and 106: obtained from fruits of black choke
Page 107 and 108: In our opinion, the best estimate a
Page 109 and 110: cuttings also varies markedly with
Page 111 and 112: shoots shorter than 10 mm were not
Page 113 and 114: 14. Ostrolucka M.G., Gajdosova A, L
Page 115 and 116: „Metos RG-350” (http://www.meto
Page 117 and 118: 500480Phenols,mg 100g -146044042040
Page 119 and 120: SHORT INFORMATION ABOUT THE HISTORY
Page 121 and 122: Evaluation of cultivars. After the
Page 123: the number of pistils (female clone
Page 127 and 128: ResultsFirst time upright dieback i
Page 129 and 130: grew rapidly on PDA at 20 - 24 o C.
Page 131 and 132: Figure 9. Conidia of Physalospora v
Page 133 and 134: References1. CABI, EPPO, (1997) Dia
Page 135 and 136: Results und DiscussionBerries were
Page 137 and 138: In literature Caruso eds. and Гop
Page 139 and 140: the total area under a cranberry ma
Page 141 and 142: Skilled works on development of the
Page 143 and 144: Tika atrastas dažas būtiskas ats
Page 145 and 146: appears to maintain a quite low lev
Page 147 and 148: 8. Garkava - Gustavson L.,Persson H
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