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Selection criteria in cloudberry Eivind Uleberg, Inger Martinussen, Gunnlaug Røthe

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Clone evaluations at Bioforsk Holt Selection criteria – Number of pistils or stamens per flower – Number of flowers – Number of shoots per m 2 Released cultivars – Two female; ‘Fjellgull’ and ‘Fjordgull’ – Two male; ‘Apollen’ and ‘Apolto’

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Materials and methods Clones planted on peat in open outdoor benches – 0.8 m 2 squares – 16 plants per square – Established 2003 Observations – Number of flowers – Number of berries – Fresh weight of berries

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Clone material NumberOriginSexLatitudeAltitude 002EnglandFemale54º30’. 102Aust AgderFemale58º30’50 104Aust AgderFemale58º30’350 105Aust AgderMale58º30’650 106Aust AgderFemale58º30’650 202HedmarkFemale62º30’50 206HedmarkFemale62º30’650 208HedmarkFemale62º30’950 304NordlandFemale66º30’350 306NordlandFemale66º30’650 404FinnmarkFemale70º30’350 602SvalbardFemale78º38’80

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Number of flowers

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Number of berries

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Number of flowers per berry Clone200620072008Totally 0022,261,162,722,04 1022,882,072,562,45 10415,6332,1141,2924,31 10692,0063,25389,00112,22 2022,521,572,732,41 2062,371,393,612,34 2084,052,683,022,98 3042,931,692,382,34 3063,481,301,981,88 40415,5427,1173,3326,64 6024,292,033,122,90

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Mean berry weights

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Mean berry weights as affected by harvesting time

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Antioxidant content of different genotypes

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Conclusions Further evaluations needed before deciding future selection criteria – Genetic and environmental variance – Heritability estimates – Genotype by environment interactions? Berry contents will most likely be included as new selection criteria

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