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  2. Mutation theory, idea that new species are formed from the sudden and unexpected emergence of alterations in their defining traits. Advanced at the beginning of the 20th century by Dutch botanist and geneticist Hugo de Vries in his Die Mutationstheorie (1901–03; The Mutation Theory), mutation.

  3. Sep 6, 2011 · We have first indicated that the root of the currently burgeoning field of plant genomics goes back to Hugo de Vries, who proposed the mutation theory of evolution more than a century ago and that he unknowingly found the importance of polyploidy and chromosomal rearrangements in plant speciation.

    • Masatoshi Nei, Masafumi Nozawa
    • 10.1093/gbe/evr028
    • 2011
    • Genome Biol Evol. 2011; 3: 812-829.
  4. De Vries's theory was one of the chief contenders for the explanation of how evolution worked, leading, for example, Thomas Hunt Morgan to study mutations in the fruit fly, until the modern evolutionary synthesis became the dominant model in the 1930s.

  5. Co· incidently with its appearance, De· Vries began to publish the results of his investigations upon variability, and mutations in plants, upon which he finally erected his Mutation...

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