F1 females could be backcrossed to the male homozygous recessive parent.
也可用雌性F1与隐性纯合雄性亲本回交。
2
Their F_2 is backcrossed with 7902- 4, and F_2 of this backcross is backcrossed again with 40354, and then selected by using the modified pedigree and bulk selection procedure.
The male-sterile plants from the crosses between dominant male-sterile hexaploid triticale and durum wheat as well as bearded wheat were backcrossed many times with the same male parents.