Dave :

There is not much written info in the way of studies on the BG/CNBG questions you raise. What I have seen indicates that like LMB they spawn with no regard for subspecies. The offspring like LMB would not be hybrids (as in HBG) as they are the same species. They should retain the qualities of BG and not show hybrid vigor or depression as in crosses. I have not seen any info on either BG or CNBG having or creating a dominate gene or different gene type fish. Both have been in our ponds for over ten years and there has been no indication of a problem with the approach. We try to keep a balance of the 2 in our stocking efforts. The big difference between the 2 is the better performance in colder climates/water of BG over CNBG and the laters somewhat larger size in warm climates/water.