title: Practical animal breeding as the key to an integrated view of genetics, eugenics and evolutionary theory: Arend L. Hagedoorn (1885-1953).
abstract: In the history of genetics Arend Hagedoorn (1885-1953) is mainly known for the 'Hagedoorn effect', which states that part of the changes in variability that populations undergo over time are due to chance effects. Leaving this contribution aside, Hagedoorn's work has received scarcely any attention from historians. This is mainly due to the fact that Hagedoorn was an expert in animal breeding, a field that historians have only recently begun to explore. His work provides an example of how a prominent geneticist envisaged animal breeding to be reformed by the new science of heredity. Hagedoorn, a pupil of Hugo de Vries, tried to integrate his insights as a Mendelian geneticist and an animal breeding expert in a unified view of heredity, eugenics and evolution. In this paper I aim to elucidate how these fields were connected in Hagedoorn's work.
authors.affiliation: Descartes Centre for the History and Philosophy of the Sciences and the Humanities, Utrecht University, Netherlands. Electronic address: l.t.g.theunissen@uu.nl.
authors.forename: Bert
authors.initials: B
authors.lastname: Theunissen
mesh_terms: D000822:Animal Husbandry / Q000266:history*; D000818:Animals; D005075:Biological Evolution; D001947:Breeding / Q000266:history*; D005053:Eugenics / Q000266:history*; D005823:Genetics / Q000266:history*; D049673:History, 20th Century
keywords: Eugenics; Hagedoorn; Hagedoorn effect; Hybridisation; Livestock breeding; Mendelism