Interspecific hybridization was not possible with F.
×ananassa‘Akihime’ regardless of reciprocal crossing except with ‘Hawaii-30’
as seed parent, which produced many achenes and normal plants.
Of the achenes obtained from crossing between ‘Hawaii-30’ and
‘Akihime’, 4.2% germinated, 28 of 40 hybrid plants withered during
growth, and 12 grew into normal plants. In particular, one pentaploid
plant was obtained from the cross between ‘Akihime’ and
‘Whiteberry’.