Double cross plan was suggested by

A double cross plan was suggested by Jones.
Donald Forsha Jones (16^th April 1890 - 19^th June 1963) was a United States maize geneticist and practical corn breeder at the Connecticut Agricultural Experiment Station, New Haven. Beginning at the station in 1914, he made high-yielding hybrid corn practical with his invention of the double-cross hybrid. The double cross was the basic technique used in developing modern hybrid maize and has been used by commercial firms since. Jones's invention was to use four inbred lines instead of two in crossing.