I’m an admitted amateur, so my modus operandi is (1) read to learn, and (2) discuss to explore and test. Being an amateur, I try to provide scientific research to support my assertions. And I hope that others will do the same.
<< What allows you to say that JT02 and JBT06 are hybrids and that they would have the possibility of making PCNA hybrids? These hybrids might as well not carry the PCNA genes, right? >>
We know that Taishu must have 6 NA genes. So JT-02 must have 3 NA genes. If there is a back-cross of JT-02 x Taishu, something like 5% of the offspring will have a full complement of 6 NA genes. This is not merely my estimate, it is supported by published scientific reports that I posted.
<< On what scientific basis do you extrapolate results on pure Asian trials for hybrids. What allows you to say how the PCNA genes associated with the diospyros virginiana genes will be expressed? >>
I have freely cautioned that Kaki NA genes might not work as hoped in a Kaki x DV hybrid. In a separate thread, I cautioned that it seems unlikely that Kaki PV genes will produce non-astringency in a Kaki x DV hybrid.
<< The easiest solution would probably be a cPCNA x the Rosseyanka 18 male mutation. . . . But they will offer cPCNA pollinator males which this time can be used to pollinate virginiana. Simple no. >>
I think you answered your own question here. A C-PPCNA x DV hybrid might work but we can’t try.
BTW, your silence about details doesn’t hurt me except symbolically because I’m not actually going to do any breeding. But it does hurt other members of the forum who might avoid wasted effort with better information.