One of the lectures I remember most clearly from an economic botany class at Yale University that I took more than 50 years ago was about vegetables in the family Cruciferae (now Brassicaceae). In that lecture, James Rodman, the professor, described the work of Georgii Karpechenko, a Soviet botanist who had hybridized two brassicaceous plants, Raphanus radishes and Brassica cabbage, to create a new genus, Raphanobrassica, through allopolyploidy (1).