Abstract
‘Dingaras Multiple Purple’ (‘DMP’) was introduced from India and is resistant to bacterial wilt caused by Ralstonia solanacearum. To analyze the genes providing bacterial wilt-resistance in ‘DMP’, the F1, F2 and BC1 (‘Mizu-nasu’/‘DMP’) groups were evaluated for bacterial wilt-resistance by bioassay methods using hydroponics with containers and bottles. Histograms of the death rate in F2 group displayed a normal distribution. This suggested that the bacterial wilt-resistance in ‘DMP’ is polygenic. Since the death rate was not influenced by different cross combinations between ‘Mizu-nasu’ and ‘DMP’ in F1 and F2 groups, the main bacterial wilt-resistance in ‘DMP’ is in the nuclear gene.
