Abstract:

The germinating seeds of the rice cultivar Aixiuzhan were treated with 9 different combinations of centrifugal forces and treatment times and cultivated for generations in order to see if the centrifugal force had induction to rice. The results showed that, their germination percentage was decreased, and the rate of induced mutation increased in their M2 generation while the centrifugal force increased, and the treatment duration extended. The highest rate of the induced mutation was presented under the combination of 12000×g centrifugal force and 60 minutes of treatment time. There was no visible mutation founded in M1 generation, but there were varied inheritable mutations founded in M2 generation, and that were hereditary stably. The variations mainly happened on the stem, leaf, growth duration, panicle, grain, appearance and amylose content. It indicated that, the centrifugal force could inhibit the germination of rice seeds in M1, and did also induce inheritable mutations in rice seeds which could be used as a new induced mutation technique for rice breeding.