206 Double Flowers and Sex-Linkage in Begonia 



Details of Experiments relating to Begonia Da visil 



Eeg. No. 



Davisii selfed, 4 families, 200—300 raised all true to type 

 Lloydii selfed, 45 true 



Various doubles J ertilised hy Davisii $ . 



Single 



Lloydii X Davisii <} ... ... — 



Graf Zeppelin X do. ... ... — 



49/13 (as above) double x do. — 



20^/14 (as above) double x do. — 



A double x do. — 



28/13 (as above) double x do. — 



A double x do. ... ... — 



Argus xdo — 



Hollyhock X do — — 



Louis Boucher X do. ... — — 



Fleur de Chrysantheme x do. — — 



Davisii ? fertilised hy double. 



Davisii 2 x Lloydii s ... 72 42 



Reciprocal crosses with a half double. 



Davisii x 3V14 half double ... 39 15 



3*'/14 half double x Davisii 

 The same half double 3^/14 

 selfed 



1? 



.3 



28 



2 



49 



17 



Reciprocal crosses with a heterozygous single. 

 105 1 — 



68 14 5 



42 4 — 



Davisii ? x 22i/14 hetero- ) 

 zygous single ] 



221/14 heterozygous single 



X Davisii s 

 The same heterozygous ) 

 single 2^1/14 selfed j 



22oyi4 heterozygous single 



X Davisii s 

 The same 2^0/14 selfed 



67 

 45 



9 

 10 



17 



34 

 1 



109 



8 



23 



24 

 1 



The following are tests of two plants bred in Experiment No. .14, 

 Davisii $ x Lloydii ,}. In the first group 10717, a single, was used : 

 in the second group 10717, a slightly petalodic, was used. In both, the 

 male side proved to be predominantly double. 



