Shelley Jansky in Field (IMAGE) American Society of Agronomy Caption Jansky's team improved potato qualities by cross-breeding with South American wild potatoes. Credit Photo provided by Shelley Jansky. Usage Restrictions Please use with story only. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.