So you mean to say you're using females, trying to get pollen from one but not using hermies? Am I missing something?
What you're describing is an F1 cross, first generation, least stable, most phenos. So the first batch of seeds is basically a toss up, but you've got the ball rolling and now you have some room for selective breeding. So say you made your RDxG13, and called it RDG13 the next step is to grow a breeding stock from which you can select certain traits. Your next cross would be RDG13xRDG13 F2, and that basically means that it'll be slightly more predictable, stable, fewer phenos because you've selectively sought out certain traits from both parent plants which should carry on in larger percentage every time you do a new generation. So F2s will still be very unstable, unpredictable, and have many phenos in reality. As you progress your new strain will become more and more stable, and have fewer phenos, be much more predictable.