Improvement of flowering in Calceolaria by cold treatment and selection.

Cold treatment for 4 weeks at 10 deg C resulted in shortening of the uneven flowering period as a consequence of a delay of the early-flowering and an advance of the late-flowering plants. For the selection material used, the effect was notably a delay of the early-flowering plants. The percentage of flowering plants was favourably influenced by cold treatment. The number of simultaneously flowering plants was also increased by selection, although to a lesser extent. (Abstract retrieved from CAB Abstracts by CABI’s permission