In order to tap the germplasm of apomixis and provide reference to a line hybrid rice breeding

by studying ion-implanted autotetraploid twin-embryo seedling mutant rice regeneration

its original parent and the seedling progeny

systematic comparisons were done on agronomic characteristics

traits of awn and grain characters of the three materials.The results showed that they were similar in the main agronomic characteristics.Compared with the original parent

the awn length of the plant regeneration had been significantly reduced

the plant regeneration varied greatly in grain characters.Compared with the plant regeneration

the awn length of the seedling progeny had no significant increase or decrease;the seedling progeny had small difference in grain traits.