After reading a bit I want to know that I understand correctly
F1 is a female from regular seed.
M0 is a male from regular seed.
S - Always be female.
F1 + F1 = S1
S1 + S1 = S2
S1 + F1 = S2
S2 + S1/S2 = S3
if i bay FEM seed from shop that HAVE to be - S1 or S2 or any S.
any combination...