The purpose of this project is to expand corn to cooler seasons and increase the profitability of northern Minnesota farmers. A long-term solution for improving profitability in this vast region is to develop cold tolerant high quality products for the sustainable corn production in central and northern Minnesota. For that purpose, this project will utilize unique corn products and methods developed in joint historical successful efforts between North Dakota and Minnesota. Thousands of lines and hybrids will be screened in marginal regions under severe controlled cold stress short-season environments aiming at fast cold tolerance short-season genetic improvement. Elite tropical and temperate corn adapted to North Dakota will be screened and only a few will survive each season for hybrid testing.