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1·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.

回交亲本为7902-4和40354。杂种第二代用7902-4进行回交，回交第二代用40354再次回交，之后用改良系谱混合选择法进行选育。

3·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.

用已育成的显性雄性不育六倍体小黑麦为母本分别与硬粒小麦、二粒小麦及黑麦杂交，并每代选不育株用原父本回交。