1717: Thomas Fairchild: Developed first Inter specific hybrid between sweat William and Carnation Species of Dianthus.
1800: Knight, T.A (English): First used Artificial Hybridization in Fruit Crops.
Charles Darwin published the first edition of The Origin of the Species which, amongst other things, gives extensive information on the knowledge of breeding at that time.
1865 Gregor Mendel's publicised his discoveries on the breeding of peas, which became the foundation of modern genetics.
1869 Friedrich Miescher discovers nuclein -- a major component of which is DNA -- in the cell nucleus.
By three scientists, among which Hugo de Vries
1902 Walter Sutton & Theodor Boveri propose that inheritance is due to chromosomes
1953 James Watson and Francis Crick proposed the double helix structure of DNA.
1924 Rudolf Steiner Biodynamic Agriculture