Abstract: Through the statistical analysis of the seed setting rate of 37 high seed setting tetraploid rice, it was found that the high seed setting characteristics of polyploid meiosis stability（PMeS） could be stably inherited, and the seed setting rate of the selected different lines was more than 80%. Therefore, in the process of homozygous addition of tetraploid rice, with the increase of generation, it was possible to select the ideal stable high-seeding material by increaseing the total number of grains and the number of filled grains, and the increase and decrease of the number of unfilled grains had become an important index for the field breeding of tetraploid rice in Hubei Province. In the process of homozygous addition of tetraploid rice, it was possible to continue pressure selection from the aspect of improving seed setting rate. Although it was possible to breed more ideal materials, the selection probability was very small, especially in the quick selection of more ideal materials. Therefore, the choice should be placed more on the improvement of comprehensive traits.

Key words: tetraploid rice, the seed setting rate, selection