Essence and origin of Mendel's discovery.

In early 19th-century Moravia, breeders of animals and plants joined with other interested citizens in the Moravian and Silesian Agricultural Society to debate economic priorities. Several of the senior members had a profound influence upon breeding theory: J.K. Nestler, Professor of Natural History and Agriculture at the University of Olomouc, left a collection of influential writings. In the context of sheep breeding he defined 'inheritance capacity' (Vererbungsfähigkeit), 'hereditary history' (Vererbungsgeschichte) and 'developmental history' (Entwicklungsgeschichte). His linking of the last two terms, as two sides of the same coin, puts Mendel's use of the second one in context. Professor F. Diebl taught the same topics as Nestler at the Philosophical Institute in Brno, with a bias towards plants. Diebl's lectures were attended by Mendel who gained top marks in three examinations. Diebl stressed the importance of artificial pollination to produce new varieties and recognised peas and beans as suitable subjects for the procedure. Prelate Cyrill Napp, abbot before Mendel, had a deep interest in heredity and how it was transmitted through both sexes. He generously supported Mendel's research. A happy blend of economic and academic influences, together with original talent and inner drive, led to Mendel's great discovery.