Göte Turesson, born on April 6, 1892, in Malmö, Sweden, and deceased on December 30, 1970, in Uppsala, stands as a foundational figure in 20th-century Swedish botany and plant genetics. Educated at the University of Washington and Lund University, he later served as Professor of Systematic Botany and Genetics at Ultuna, now the primary campus of the Swedish University of Agricultural Sciences (SLU). Turesson’s seminal contributions lie in the development of ecological genetics, particularly through his introduction of the concept of the “ecotype” in 1922. In his landmark publications in Hereditas—”The species and the variety as ecological units” and “The genotypical response of the plant species to the habitat”—he experimentally demonstrated, via common garden experiments and reciprocal transplants, that intraspecific variations among plant populations often reflect genetically based local adaptations to environmental factors such as soil, climate, altitude, and proximity to the sea. These adaptations persist hereditarily even under uniform cultivation conditions, providing key insights into local adaptation and the initial stages of speciation. This work laid the groundwork for genecology, the study of genetic variation in relation to ecology.
Turesson also advanced research on apomictic species—those reproducing asexually—coining the term “agamospecies” to describe taxa maintained through such mechanisms. His institutional legacy includes the establishment of the Genetic Garden at Ultuna in 1937, a botanical-genetic facility preserved today as a tangible record of his experiments on local adaptation.
Benedicte Turesson (often cited as B. Turesson), Göte’s spouse, emerged as an active collaborator in cytotaxonomic studies, particularly in the latter phase of his career. Though biographical details are sparse, her contributions are evident in primary sources. As early as 1930, Göte acknowledged her substantial assistance in chromosome counts for Festuca ovina. She later co-authored several works with him in the 1950s and 1960s, focusing on the cytogenetics and cytology of the genus Hieracium subgenus Pilosella (hawkweeds), a taxonomically challenging group characterized by apomixis and polyploidy. Key joint publications include:
- Turesson, G. & Turesson, B. (1960). Experimental studies in Hieracium pilosella L. Hereditas 46: 717–736.
- Turesson, G. & Turesson, B. (1963). Observations on chromosome number and mode of reproduction in some taxa of Hieracium subgen. Pilosella. Botaniska Notiser 116: 157–160.
These studies addressed chromosome numbers, reproductive modes (sexual versus apomictic), and cytogenetic variation within this variable complex. Benedicte’s independent scholarship is highlighted in her sole-authored follow-up: Turesson, B. (1972). Experimental studies in Hieracium pilosella L. II. Taxonomy and differentiation. Botaniska Notiser 125: 223–240.
Together, the Turessons exemplify collaborative advancement in plant cytogenetics, bridging ecological genetics with cytotaxonomic analysis of apomictic complexes. Their work remains influential in understanding genetic diversity and reproductive strategies in challenging plant taxa.