Russ, I kind of think that the new outcrosses would need growing out for "macro" reasons, in other words, to increase their population in the world and be disseminated to other places growing and reproducing. That reduces their risk of extinction and continues the genetic diversity of Phaseolus vulgaris both as it is and as it increases. We seem to be enjoying a period right now of vulgaris' rapid variety increase while simultaneously humans are becoming more vulnerable to sudden food crop loss because of emerging disease and other issues.
To me, it means Great Spirit is gifting us with new varieties that hardly any of us could actually do the surgery to create ourselves, by way of our Bumblebee friends. We ought to help to make sure these new varieties spread to different geographic places, even if it's 5 seeds here, 10 seeds there.
What I'm saying is I hope the outcrosses will be on the list too.
Ya know, I was reading a scientific american article from about a year ago that mentioned a genetic testing machine being developed which will be very inexpensive. Maybe even cheap enough that college and public libraries might have them in the near future. Those things can analyze population groups, and that would be especially interesting for P. vulgaris to compare the theory that they are in 5 subspecies that can cross between but with different limitations such as certain ones have to be the female parent in a cross with certain other subspecies.
PXBT does to me really seem to be a subspecies cross! Growth pattern similar to the subspecies that little brown cat is part of, but with the stem and leaf coloration partially of the subspecies that some of the purple podded varieties belong to.
And then there is the subspecies of the vining Rio Zape. I really think it is the same subspecies as the kind of Black Coco I have which I'll send to you. Might want to keep them separate from your Black Coco. I think they may be very different varieties but given the same name because of the similarity of the Bean seed. If they are different, my accession or variety should probably have the word Native added to its name.
Subspecies outcrosses will really help vulgaris' diversity and should be spread to different locations. Just my thoughts Russ.