Whatever you do, do not use bag seeds in any breeding project!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Bag seeds are almost always the result of a female plant turning hermaphroditic during late flower and "self seeding".
This will lead to 2 things if breeding with these seeds
1) - an almost 100% chance of the offspring being hermies or at the very least, containing dominant genes for doing so,
and
2) - self seeds have a greater probability of introducing undesirable genetic traits in the offspring due to genetic recombination possibly allowing recessive (bad) genes to once again become dominant genes and for the expression of those poor qualities.
All breeding should be done with 100% pure male and 100% pure female plants only.
Continued breeding with bag seeds will eventually lead to acclimatized weedy hemp and not psychoactive cannabis.
Unless you have space, time and the inclination (and the money!) to grow hundreds of seedlings, always looking for the best examples and for plants with unique features and rejecting all others, growing a commercial line of genetically stable and pure breeding seeds for sale and distribution, is no easy task.
This can take years and many, many cycles of growing to stabilize the "iccbr3i" line of Super Dope, before even releasing it to the public. It only takes a few failures before public confidence is lost, dooming you to financial ruin. I know of commercial breeders that worked on one strain for 15 years before they were happy/confident enough to release that strain for public sale. Not quite as simple as you may have thought. Also, you want to start with 5 random seeds of known parentage. You do realise that to find that "special" breeding mother and father plants, you should be starting with 500 - 5000 seedlings? Then repeating this for 10-30 generations to stabilize and find improvements, all backed up with 1000s of reserve seeds and 100s of reserve clones!
Home breeding for yourself can be much fun, but again, the selection of parental plants is vital. You can't just use any old plants and must be prepared to grow a few/many regular plants to find the male with the best features, to be the "father" to your selected ladies. I would not used chemically reversed females as a source of pollen producers, for fear of any questionable genetic "damage" caused through that process, and would probably prefer to use females that also grew from regular seeds and not females from "feminised" seeds, again in fear of any latent genetic flaws.
However, using feminised females makes life easier, although I am not sure if the feminization process damages chromosomes, as I have had some weird results as compared to using females grown from regular seeds, which have never presented anything in the offspring what I would classify as weird.
More experimenting will hopefully solve this mystery.
I would suggest starting with a few female plants of different strains, and use just one male plant, selected from 3-10 males from the same strain, to be the first father in your line of home bred iccbr3i plants. Having just one male is not enough, you want to find one that is bushy, healthy, vigorous and has "that something special" the others don't. Also, you want to consider if you want to introduce an early, mid or late flowering trait into your mother plants. I would suggest writing a list of what you want in your line of plants. Do you want indica or sativa dominant plants? Do you want tall plants or squat bushy plants? What sort of high are you looking for? After answering these questions, start investigating genetics of what is already available from real breeders with reputable businesses, and do not use seeds of unknown parentage that your friends tell you are "killer", the risk of bad genetics is too great and not knowing the exact genetics is like driving blind. The breeders all list maturation times, genetic composition and mostly, the plants' growth structure, aromas, tastes and potency. List all the strains you find and think are what you are seeking, then over some time, cut this list back to a realistic number of 10-12 strains that you could comfortably grow. Finding the regular seeds for your male/father plant will be harder, as most breeders rely heavily on feminised seeds, however, the regular seeds that are available are usually the better genetics - the breeders want to showcase their brand and generally don't offer duds in their regular seed line up. You will then need an area to grow your potential father plants and once the one "chosen one" male is found, an area to grow him while he flowers that is isolated from the females, to prevent the entire crop from becoming seeded. If he starts flowering long before your females have started flowering, pruning him heavily will delay his flowering. It is best to keep him in a windless place, this will make pollen collection much easier. Harvesting individual male flowers on the cusp of opening and placing them in a bowl is the easiest way of collecting pollen for later use. Once harvested, the male flowers will open within a day or two and release their pollen, just make sure to take the opened flowers out of the bowl once the pollen has been released, this prevents moisture from damaging the pollen. I then mix the pollen 50/50 with corn flour, this extends it and it still has plenty of pollen to ensure enough pollen for successful fertilization. I then use a small paint brush to apply it to the chosen female flowers with nearly all white pistil still, usually when there is no wind blowing and about 90 minutes before dark. This gives an hour for fertilization (which only takes 20-30 minutes, but giving 60 minutes makes it a sure thing) and then to have some time to spray the excess pollen/flour mixture with water to kill it and stop it from seeding flowers that I don't want seeds in. The seeds need 4-6 weeks to fully mature, so fertilizing the female flowers early in flower development is essential. Don't worry, a few pollinated flowers can provide many, many seeds. Pollinating the female plants early can also help prevent any hermaphroditism from developing later in flowering, due to the plant having hormones "telling" the plant that it is fertilized and there is no need for self pollination (hermaphroditism). Make sure to attach a pipe cleaner/bit of string etc to the pollinated branches, this way when you harvest, you will know where the seeds should be, however they are usually quite visible when matured. I also like to pollinate the lower branches of the plant, this way the top of the plant should be mostly seedless, there may be the odd seed here or there due to wind borne pollen or accidental transference, and this way too, if the plant is ready to harvest, the top part can be chopped off, leaving the lower branches to continue seed maturation. Remember to take plenty of notes - pollen application dates, male plant descriptions, seed maturation times, seed descriptions too can help if seeds get mixed up from different females - and label all seeds immediately! It is very easy to put some in a bowl to dry then think you will remember, but do it with 10-12 plants and with separate drying bowls for each and it can very easily get confusing as to which bowl has which seeds!
I wish you well with your breeding adventure, but World Domination is no easy task!
Hope this helps,.......... Organoman. Oh yeah - I forgot - set goals and stick to them - and reject all others!!