Pretty sure I know the story of Chemdog but not going to argue it here.. the rumormill is horrible so lets' get to breeding the simple way.. I grow ONLY Auto's now and I do something called Pre-Flower pollination so I don't lose my entire crop, small as it is, to seed production.. but, if I have a strain I want to save this method works great.. I now use it to cross Autos and am right now trying to take Lorans : Long Bottom Leaf Lemon pheno and turn it auto with his permission of course..
It's simple really, the plants do all the work.. Allow the male to live just long enough to pollinate the early hairs on females and then cull the male or males, some like to use multiple males.. Right now I am crossing a bunch of different strains with Sour Bubble as I am a Bubblegum freak, forget Kush, I prefer BOG's Bogglegum anyday.
This method will work same with photo period too.. I average about 20 seeds per plant and this works great with Auto's because by the time you pollinate, cull the male the plant has about 6-7wks to finish up and seeds take 6wks to be viable or mature ... the longer you allow the male to open pollen sacs and females to produce more hairs, the more seeds your going to come up with.. the plants closer to the male get hit hardest..
Hope this helps... here are my current ladies I just hit with Sour Bubble aka: Bogglegum x Bogglegum x Bogglegum bx3..
good luck