I think the issue people would have would be selling the results of the crosses as purebred for either breed. As long as the heritage is fully disclosed to the next breeder, then they can decide if that is what they want to work with. My overarching goal with my GH birds is preservation of the genes I received from Joel. To that end, I feel I should distribute them widely, but my goals do not include outcrossing to other breeds.
I love the hear the results of such breeding and the genetic information gleaned, just do not represent them as pure GH to anyone until you have a stabilized line that has been used by experienced tiers and given a big thumbs up, then they would be your line, no longer the line of the breeder you got them from.
I totally agree with you, that introducing new birds should be disclosed if you were changing the genome and selling these hybrids as pure strain breeder birds, claiming these were (example) the ORIGINAL Hackle line you bought into ( MINER, METZ, ALSDORF, WHITING, DARBEE, ETC) ; or if you were telling people buying your Phoenix that these hybrids are pure, undiluted Phoenix from the original show lines.
However, it did not sound to me as if Jacin wants to do this experiment for lucrative purposes or to start new strain(s) to propagate a new or "enhanced" breed for sales. I had a distinct impression this was for her own personal curiosity and edification.
As far as creating a new breed type, as you probably are aware, it literally takes generations\ years to develop new breeds; you have to present a large number of identical animals that can be shown to have all of the exact same traits reproduced , present them to the Poultry Association, show them at many shows, apply for a standard of perfection: you must get several judges to find the animal to be what you say it is, and other enthusiasts to support you in this rather expensive endeavor; it is inordinately time involving and complicated.
Moreover, people generally do it because of their ( almost fanatical) dedication to the idea of creating a new type of breed; definitely, it is not for the casual hobbyist.
Jacin stated she has a rather limited number of hobby birds and would to do a cross ( or crosses) to see the result. I did not see her mention selling any of the possible offspring produced, though that was prudent of you to mention that no, they could not be sold as purebreds of Phoenix( a recognized show bird with the poultry association) or as True Genetic Hackle Fowl( which we cannot show since there is not a Standard of perfection on them, due to lack of standardization on many levels. )
Brian Reeder himself encourages this curiosity, accompanied by careful documentation, thus as keeping exact notes as one of the best ways to learn about the effects of the genes in chickens. He notes that this is how genetic discoveries of alleles and gene sequences have effects and can be discussed and further studied.
We have been taught thinking in terms of Mendelian inheritance and the classic Punnet Square, with the idea of straightforward dominants\ recessives from high school biology, but it is SO much more complex than it was ever presented to us with the pea plants of Mendel.
Avian genetics is in its infancy: and the effects of dilution, extension of phaemelanin and eumelanin, autosomal dominants, quantitative accumulation of traits, just to name a few, and the intricacies of pleitrophic effect on feathering, both in density and length, coloration, musculature, skeletal structure, silhouette, density, short and long feathering, fast and slow growing feathering; non molting genes vs molting genes--and I am merely remarking on the tip of the iceberg that avian students & enthusiasts are able to see and have been recorded in a few papers & books-- are fascinating and certainly need to be explored.
This field is wide open now, and there is a plethora of knowledge to be gained at both a personal and a professional level; whether you are doing research for a publication at a university level for a thesis or research paper with your professors; or if it is to try to understand the effects of quantitative genetic expression, linkage, pleitrophy, etc.through your own research.
I was glad to see you support this research as well and would like to see her results: this truly would be insightful, even with just a limited number of crosses instead of hundreds or thousands, as you would see with Dr. Whiting.
Scientific curiosity is rare nowadays, and certainly must be encouraged when it is expressed in an individual.