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Hugo De Vries

1848-1935

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Dutch botanist and geneticist who introduced the experimental study of organic evolution. His rediscovery in 1900 of Gregor Mendel's principles of heredity and his theory of biological mutation, though considerably different from a modern understanding of the phenomenon, resolved ambiguous concepts concerning the nature of variation of species that, until then, had precluded the universal acceptance and active investigation of Charles Darwin's system of organic evolution.

 

Biography

1848 born
1870 received Ph.D. in the University of Leiden
1877 demonstrated a relation between osmotic pressure and the molecular weight of substances in plant cells
1878 professor of botany at University of Amsterdam until 1918
1886 noticed wild varieties of the evening primrose (Oenothera lamarckiana)
1889 published Intracellular Pangenesis
1892 began a program of plant breeding
1896 obtained clear evidence for the segregation of characters in the offspring of crosses in 3:1 ratios
1900 rediscovery of Mendel's laws of heredity
1901 published The Mutation Theory, which expounded on his developments in the theory of mutation
1905 elected a fellow of the Royal Society
1907 published Plant Breeding
1918 retired from University of Amsterdam
1935 died May 21 near Amsterdam