Miracle F1 (cauliflower, Bejo Zaden ) was used as Xanthomonas campestris races differential variety with proposed gene R3 (Taylor JD, Conway J, Roberts SJ, Astley D, Vicente JG. Sources and origin of resistance to Xanthomonas campestris pv. campestris in Brassica genomes. Phytopathology. 2002 Jan;92(1):105-11.; Vicente JG, Taylor JD, Sharpe AG, Parkin IA, Lydiate DJ, King GJ. Inheritance of race-specific resistance to Xanthomonas campestris pv. campestris in Brassica genomes. Phytopathology. 2002 Oct;92(10):1134-41.)
Now, it is impossible to find the seeds at Bejo Zaden site.
Is production of Miracle F1 discontinued? What variety can be used as R3 source instead of Miracle F1?