It was found that the progenies of HYA-1individual was long-term separated in plant height with genetical homozygosity loss.

• 本研究所用材料是从空间诱变后SP1代中选出的半矮秆突变体，命名为HYA-1。HYA-1出现了特殊的遗传模式，其单株后代长期高矮分离，分离出的高株后代不再分离，遗传纯合性丧失。