2009 Volume 8 Issue 2 Pages 155-159
An Asiatic hybrid lily ‘Akita petit white’ was selected from a cross between ‘Mont Blanc’ and ‘Apollo’. It is male-sterile with antherless stamens. In a field trial designed to extend the duration in order to allow year-round shipping, the antherless phenotype was stable when planted in December and May, allowing the harvesting cut flowers in April and July, respectively. However, these antherless stamens showed restoration of anthers under retarded flowering conditions in a green house in July. We demonstrated that the antherless stamens were restored to intact anthers in response to high temperature in summer. ‘Akita petit white’ showed a few spots in a perianth at 18/11°C in a growth cabinet. However, the number of these spots increased to 4.5 spots at 25/18°C and 6.3 spots at 32/25°C, respectively. It was suggested that the expression of the flower organ of lily was influenced by temperature. Moreover, this temperature-sensitive male-sterile cultivar would be useful as a breeding parent.
