542 
E. G. Anderson 
pericarp. Sections of this bronze pericarp showed a small amount of 
orange pigment. 
With these suggestions in mind as a working basis, experiments were 
planned to test them. 
ANALYSIS OF INHERITANCE 
Interrelations of green, salmon, and brouon silks 
The indications just mentioned, regarding the relationships of these 
silk colors, were all checked and corroborated by further tests. Crosses 
of green with salmon gave green in the first generation, segregating green 
and salmon, or green, salmon, and brown, in the second. The distinction 
between salmon and brown was not sharp. With the small numbers used 
in these tests, the numbers approach a simple ratio of 3 greens to 1 salmon 
or to 1 salmon and brown. 
Crosses between green and brown likewise gave green, segregating in 
the F 2 into green and brown or in some cases into green, salmon, and brown. 
In either case there was about 75 per cent of greens. * 
Crosses of salmon with brown gave salmon. The F 2 ranged from salmon 
to brown, with salmon predominating. 
These results show that there is a common factor pair which differen- 
tiates between green on the one hand and salmon and brown on the other. 
This pair is herein referred to as the salmon-silk factor pair and is desig- 
nated by the symbols Sm sm. 
The difference between salmon and brown silks is not explained by these 
simple tests, tho the occurrence of brown silks in the progenies of out- 
crosses of salmon, and vice versa, is at least a strong indication of one or 
more modifying factors. 
Relation of salmon silks to pericarp color 
In order to test the relationship of the salmon factor to the factor for 
pericarp color, two series of crosses were made. In the first, a colored- 
pericarp, green-silked plant (P Sm) was crossed with a light-bronze-peri- 
carp, brown-silked plant (p sm). In the second, two white-pericarp 
green-silked plants (p Sm) were crossed with the original salmon-silked 
plant, which had red pericarp (P s??i). The Fi's were crossed with the 
double recessive. The results are given in table 1 : 
