Genetical studies on aenothera / Bradley moore Davis.

  • Davis, Bradley Moore.
Date:
1913
Catalogue details

Licence: In copyright

Credit: Genetical studies on aenothera / Bradley moore Davis. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    24/30 (page 570)
    the characters of Lamarckiana. It is of course in no way essential to the hypothesis of the hybrid origin of La- marckiana that the plant should have, arisen as the product of a simple cross. With Lamarck’s plant elimi- nated from the problem of the origin of De Vries’s ma- terial, the importance of grandiflora, on historical grounds, is materially lessened and we may consider other large-flowered types of more recent introduction into Europe as possible parents in a cross. The resemblance of my various hybrids to Lamarckiana and the parallelism of their behavior in the F2 and F3 to that of Lamarckiana give in themselves sufficient reasons, in my opinion, to justify the belief in its hybrid character and to point to the probability that this plant arose as a cross between distinct forms of CEnothera. Lamarckiana thus would not be representative of a wild species of essentially stable germinal constitution and its ‘‘muta- tions” are most simply interpreted as the behavior of a hybrid. University op Pennsylvania, April, 1913 LITERATURE CITED Bartlett, H. H., 1913. The Delimitation of CEnothera biennis L. Bhodora, Vol. XV, p. 48, 1913. Davis, B. M., 1910. Notes on the Behavior of Certain Hybrids of CEnotliera in the First Generation. Amer. Nat., Vol. XLIV, p. 108, 1910. Davis, B. M., 1911. Some Hybrids of CEnothera biennis and 0. grandiflora that resemble 0. Lamarckiana. Amer. Nat., Vol. XLV, p. 193, 1911. Davis, B. M., 1912a. Further Hybrids of CEnothera biennis and 0. grandi- flora that resemble 0. Lamarckiana. Amer. Nat., Vol. XLVI, p. 377, 1912. Davis, B. M., 1912&. Was Lamarck’s Evening Primrose {CEnothera La- marckiana Seringe) a form of CEnothera grandiflora Solander? Bull. Tor. Bot. Club, Vol. XXXIX, p. 519, 1912. Davis, B. M., 1913. Mutations in CEnothera biennis L.? Amer. Nat., Vol. XLVII, p. 116, 1913. De Vries, Hugo, 1901. Die Mutationstheorie. Leipzig, 1901-03. East, E. M., 1912. The Mendelian Notation as a Description of Physiolog- ical Facts. Amer. Nat., Vol. XLVI, p. 633, 1912.