i crossed Moon Walker Kush a large yielding photoperiod mostly indica female with a male KC45 a autoflowering 50% Brazilian Sativa 50% Russian Ruderalis. Am i correct in saying that the F1 will all be photoperiod but the 25% of the F2s will express the auto flowering trait ?
If the male was a true autoflower then yes, you will have photo in F1 & 25% auto in the F2.
If the male was not a true auto you will find out when you make F2s. (I'm assuming you no longer have the male)