JoeReal

You can graft the Gold Nugget unto Ponkan Mandarins and you won't be disappointed in terms of growth and fruit quality.

Gold Nugget is vigorous and would readily graft unto many citrus cultivars. Even my lousiest graft of them will always take and sprout. On the other hand, the Giant Key Lime is one of my most challenging citrus to graft.

Gold Nugget can be grafted unto the Volkameriana lemon and the fruit quality is more than good enough. For sure it can be grafted unto C-35, Carrizo, and Swingle. Most Trifoliate type stocks and their hybrids would be good to use. Long term compatibility, you may have problems with benching 30 years down the road if done on Swingle. But let the next generation worry about that one.