G. P. HECTOR 
8. CoLoUR IN THE STIGMA. 
159 
A coloured stigma is found in a large number of varieties. The colour 
varies in intensity from a pale red to a deep purple. 
It has been found to be 
due to a simple factor or to several interacting factors, as shown in the table :— 
Pp 
Theoretical Variety F, Observed ratio 
ratio Colour x _ no colour Colour : no colour Colour : no colour 
( Total 5 families 
Sis) ek Pankhiraj >» Pookhi y f 3°2 1 
1,015 Sz) 
{ Total 1 family } 
Surjamukhi x Pookhi ) \ 2°8 1 
731 261 
( Total 3 families . 
Noachur < Pookhi \ PH -€ 1 
870 329 
| Total 4 families 
Muramagar x Pookhi \ : \ 2°6 H 
2,198 818 
Tota! 9 families 
Matichak ™* Pookhi 3°2 il 
2,703 829 
Total 7 families } : 
Bailabakri » Pookhi |: Ul 28 1 
| 3,485 1,202 f 
: Total 2 families 
27: 387 IT gag C25 / Lea 1% 
(1 13) | Lan 631 f 
r ” at peep 
8] 175 | na came Total 2 families } ; ics 
a 21) | 469 ea | 
SUMMARY. 
In our experiments the colour in these different situations has been found 
to be due to a simple factor, segregating 3: | in F., or to two, three, and in 
one case to four interacting factors, giving ratios of 9: 7,27: 37, 81: 175 and 
15: 1. Moreover, the genetic constitution of a colour character in any one 
type is no index of its constitution in another type, the same character having 
in different types been found to give most of the above ratios. 
The combination of colour characters. 
Hitherto we have dealt with the inheritance of these colour characters 
independently of each other. It is, however, when we consider them in 
