Blaue Fuella is a tetraploid siberbian (non sino type) so not a half of a calsib....it is a tamberg creation though.
I was just going through old seed exchange pdfs, it's interesting to see such a sharp decline in what is donated to the various seed exchanges compared with 20 years ago. I realise many significant names passed within that time but thousands of seeds released and just vanished?
I'm very interested in tetraploid calsibs, I believe there's a lot of untapped potential there but being in Australia means seeds only or getting out the oryzalin and crossing fingers