Göte Wilhelm Turesson (6 April 1892 – 30 December 1970) was a Swedish evolutionary botanist who made significant contributions to ecological genetics, and coined the terms ecotype and agamospecies. He conducted extensive work to demonstrate that there is a genetic basis to the differentiation of plant populations. This work stood in sharp contrast to most researchers at the time, who believed that the differentiation of plant populations was due to phenotypic plasticity. Further, Turesson came to the conclusion that differentiation of plant populations was largely driven by natural selection. His work on locally adapted plant populations led him to coin the term "ecotype" in 1922.