permaculturekidd

I've been thinking about trying to improve the breeds of cold-hardy naners like Basjoo and fmr.Velutina; which other then their adaptability, the ability to grow from seed would probably allow better ease to show characteristics.
Though I know from my father who for years bred lovebirds to get various colors and patterns neither he nor I are sure if the techniques are the same for plants.

But I have to wonder if 1. is this futile and 2. if not why has no one done it by now?

Also because fmr.Velutina is basically a annual from what I understand won't it be easier to change in a few generation?

My main goals are to:
Decrease amount of seed to less then 12 seeds
Increase size to an average of 5 to 6 inches
Keep color, flavor, and inhouse flower/fruiting ability


All info will be helpful, thanks in advance;
Lee