176 CORRELATION OF COLOUR CHARACTERS IN RICE 
7. Variety Agartollah x Pookhi. The glume colours of both parents 
are almost indistinguishable and analysis is not possible. 
In addition to the above, two other crosses have been examined with 
reference to ripe glume colour, and have given definite results. These are 
described below. 
1. Rajshahi 22 x Bogra 17. Rajshahi 22 has glumes ripening brick- 
red like Surjamukhi, Bogra ripens yellow. Both varieties are colourless 
(green) as regards the growing vegetative parts. In F,, yellow ripe 
glumes are dominant, and in F, segregation is as shown below. 
Rajshahi 22 x Bogra 17 
- : Intermediate . 
Yellow (yellow & red) Rea 
38 52 if 
96 58 9 
An exactly similar result was obtained on crossing the same Rajshahi 22 
with another variety with similar yellow-coloured glumes. 
Rajshahi 22 x Chittagong 22 
Yellow (salcaae ea) Uniform Red 
88 61 9 
82 58 14 
47 26 8 
Total of both 371 255 47 
On examination it is seen that the figures closely approximate to a 
ratio of 9 yellow: 6 intermediate : 1 red, the expectation on this basis 
being 378°5 : 255:44: 42-06. 
On the above basis, the following results should obtain in Fy. The 
yellow will be of three constitutions (1) pure yellow AB, (2) yellow 
impure for one factor, AaBB or AABh, (3) yellow impure for both, as in 
F,. These types will give (1) pure yellow, (2) 3 yellow: 1 intermediate, 
(3) 9 yellow: 6 intermediate: 1 red. Reds being recessive will give reds 
only. 
