Breeding for variation materials of solanaceous vegetables by space mutation.

Variations in the aromatic materials SP1 to SP4 generation of eggplant,pepper and tomato were investigated.The results showed that variations in the aromatic materials occurred in SP2 generation,and the variation frequency was approximately 0.5% in general.Selective breeding for variation materials of solanaceous vegetables by space mutation was presented.The amount of spaceflight seeds should be not less than 500.Single plant of SP1 generation was numbered and the seeds were reserved.All individuals from SP1 generation should be kept and the population should be not less than 1 000 when SP2 generation was planted.Selective breeding for SP2 generation should be underlined.Only seeds of variants of SP2 generation were reserved,and the selected variants were numbered and the seeds were reserved.The selected SP2 generation materials were planted and formed line pool of SP3 generation.The valuable variant seeds of SP3 generation and subsequent generations were reserved.More than 30 plants from every line of next generation were planted until stable elite variation materials were selected out.