Mendel’s work remained unnoticed and unappreciated for some 34 years due to:
(i) Limited circulation of the “Proceedings of Brunn Natural Science Society” in which it was published,
(ii) He could not convince himself about his conclusions being universal since Mendel failed to reproduce the results on Hawkweed (Hieracium) undertaken on the suggestion of Naegeli. It was due to non-availability of pure lines,.
(iii) Lack of aggressiveness in his personality,
(iv) The scientific world was being rocked at that time by Darwin’s theory of evolution (Origin of Species, 1859).
(v) Mendel’s concept of stable, un-blending, discrete units or factors for various traits did not find acceptance from the contemporaries,
(vi) Mendel’s conclusions about heredity were ahead of his time. He used statistical methods and mathematical logic which were unfamiliar to other biologists at that time