
306 CARL HALLQVIST 
Cross 7: Bluish red flower colour x White flower colour 
Earth-brown, marbled seeds N » seed colour 
Violet flower colour 
x Rust-brown, marbled | 
| seeds 
8: Tinged blue flower colour 
Earth-brown, marbled seeds 
| Violet flower colour 
1% Rust-brown, marbled 
9: Bluish red flower colour 
Earth-brown, marbled seeds 
~ seeds 
Tinged blue flower 
colour 
Seed colour as female 
parent 
10: Bluish red flower colour 
Earth-brown, marbled seeds 
GENETICAL FORMULAE, 
Before discussing the segregations it seems desirable to give a 
summary of the genetical formulae. The formulae shall be fully dis- 
cussed later. 
R: 
M: 
thu 
a factor for pure red flower colour and rust-brown seed colour; 
it is, in addition, the fundamental colour factor; the rr-types have 
white flowers and white seeds. 
: a bluing factor giving bluish red flowers and earth-brown seeds 
with À. 
: transforms the pure red colour into violet, necessitating the Ei 
sence of R; V does not influence the seed colour. 
The factors B and V give the full blue colour when both pre- 
sent; in the absence of R no coloration is attained by any of them. 
Thus the formula RBV is required for blue colour. 
: a factor necessary for the complete development of the colour. The 
colour produced by the other factors become diluted when F is 
absent. Blue becomes tinged blue, bluish red becomes tinged red. 
The diluted forms of violet and pure red have not yet been found. 
The seed colour is not influenced by this factor. 
the marbling factor. The pigment in the seed coat becomes closely 
compacted in some parts and thinner in other when M is present. 
In the absence of M no marbling occurs the pigment being distri- 
buted evenly on the surface, interrupted only by white flecks. 
The different constant phenotypes apart from the marbling are 
s constituted as follows: 
