1. cross an auto with a photoperiod. the F1's will contain no autos.
2. cross the F1's. the F2's will contain 25% autos.
3. cross the autos from the F2 generation. the F3's will be 100% autos
4. for even more stability, backcross an F3 female to F2 pollen. The F4's traits will get more...