The term pure line was suggested by​

Wilhelm Johannsen (3 February 1857 – 11 November 1927) was a Danish pharmacist, botanist, plant physiologist, and geneticist. He is best known for coining the terms gene, phenotype and genotype, and for his 1903 "pure line" experiments in genetics.

Profession: Pharmacist, Botanist

Born: 3 February 1857, Copenhagen

Died: 11 November 1927