Crap-shoot is what I say, your not seriously asking someone to guess on the lineage of those plants when your admitting it's bag seed and you don't even know the basic info needed for such a guess, your kinda joking right?
On a lighter note, they look healthy, look very indica heavy, sort of have that Afghani or if you've ever seen a LUI or Sourbubble in veg look, but so do all indica's at this stage. Grow them out, sex and flower, once there you'll get more replies as to what the lineage "COULD" be. With tens of thousands of strains floating about with I'm sure several thousands being hobby breeders guessing lineage from a picture is like finding a certain grain of sand on a beach.... They look great though.