ISHS Acta Horticulturae 183: IV International Rubus and Ribes Symposium
VARIATION IN RIBES RUBRUM L. IN SCANDINAVIA |
| Abstract:
Population studies have been carried out in latitudinal and partly altitudinal distant populations/ecotypes of Ribes rubrum L. Types from the following localities have been included in the studies - Denmark, Aas, Sikilsdalen, Trøndelag, Misvær and Alta. Plants grown under controlled climatic conditions showed great variation in critical daylength for apical growth:
A variation in critical daylength of about 1.5 hours could also be recorded between genotypes within populations. Also in rooting ability there was registered a great variation. In Misvaer (25 genotypes) the rooting ability varied from 0–100 %. A more detailed study of the variation within populations was carried out in Misvær, Nordland. A great number of fenotypic - and fruit quality-registrations were made on spontanous plants (wild-types) and plants from privat gardens (garden-types) in that area. Population means, standard deviations and histograms, showing frequency-distributions, were calculated. The results showed great variations for almost all plant characteristics recorded. Examples of characteristics with mean and st.deviation: Flowercolour (1–5): 2.8 (std. 1.2), Quantity of berries (0–9): 4.4 (std. 2.9), Percentage of berries (number of flowers/berries per raceme): 37.8 (std. 20.5). Time for ripening (0–9): 5.0 (std. 2.7) and Leaf colour in the autumn (0–9): 1.3 (std. 1.8). Many of the wild-types had very good properties and can be used in the processing for economic and ornamental purposes. | |||||||||||||
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