use this is a reference, but its meant to be revised and updated
A x B
A = Mother
B = Pollen Donor (always listed second)
S1 = Self 1, Reversing a female to produce xx pollen, and using said pollen on same female.
IX (ix) = Inbred or Intercross, often a feminized ‘F2’ involving two different phenotypes so as not to be confused with S1.
IBL = Inbred Line. IBLs are achieved thru selection to exhibit specific traits of genetic lineages. Selections occur thru line breeding (f2-f6+) or thru a series of backcrosses.
F1 = 1st Filial Generation. Used as a term in most hybrids, although true f1 hybrids require two genetically distinct parents.
P1 x P2 = F1. F1 x F1 = F2.
bx or bc = backcross. Taking the closest genetic child from an outcross and pollinating the parent.
often breeders use this term for the parent as opposed to the outcross so Triangle Kush x (Triangle Kush x Afghani) = Triangle Kush bc1.
rbx = reversed, backcross as in reversing a female and using pollen on parent (ideally genetically closest to pollen donor).
TK/Afghani = TK x Afghani. This nomenclature is often used instead of names in more genetically diverse hybrids to avoid ‘x’ confusion as in:
TK/Afghani x TK/Afghani instead of TK x Afghani x TK x Afghani