The Ds Locus Part III. Transposition of the Ds Locus April 1949 + Appendix (First copy) Jan. 1950 April, 1949 The Ds locus. Part III. Transposition of the Ds locus. Outline 1. Introduction . . . Page 1 2. The origin of transposed Ds, Case I . . . Page 2 3. Cytological examination of plants in culture 4628 . . . Page 5 4. The genetic analysis of the plants in culture 4628 (a). Sub-culture C . . . Page 7 (b). Sub-culture D . . . Page 10 (c). Sub-culture F . . . Page 12 (d) Sub-culture G . . . Page 15 (e). Sub-culture H . . . Page 17 (f). Sub-culture I . . . Page 18 (g). Sub-culture K . . . Page 19 (h). Sub-culture L . . . Page 21 5. Considerations of the events responsible for the transposition of the Ds locus . . . Page 24