Abstract
In 50 dwarf rose cultivars sprouting of the axillary bud and adventitious root formation of 2.1-day-old single-node softwood cuttings were studied. Important and significant genotypical differences for the leaf area of cultivars, and the sprout length, rooting percentage and root weight of cuttings were demonstrated. Only 35% of the cultivars, considered too vigorous for pot culture, showed satisfactory axillary sprouting and adventitious root development. Significant positive between-cultivar correlations occurred between the leaf area and sprout length and root weight, between rooting percentage and axillary sprout length, and between axillary sprout length and root weight. Adventitious root formation in relation to the leaf area is discussed. Fast rooting of small-leaved cultivars should be improved by breeding.
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