With the advent of DNA typing for grapevines in the 1990s, zinfandel’s origins came to be known. The discovery also revealed that several other grapes were the same as zinfandel, although they carried other names. Which of the following grapes is not identical to zinfandel?
B. Plavac Mali
C. Crljenak Kaštelanski
DNA typing reveals that the Italian grape primitivo, and the Croatian grapes crljenak kaštelanski and tribidrag are synonyms for zinfandel. Plavac mali (also well known in Croatia) is not the same variety, but it is the offspring of zinfandel.