174 CORRELATION OF COLOUR CHARACTERS IN RICE 
In this case the figures again approximate to a1: 2: 1 ratio for red, 
pale red, and white, but the white class appears to be of two sorts, viz., a 
pale amber class and a pure white. 
SUMMARY, 
Red colour in the grain ordinarily gives simple 3: 1 segregation in F , 
and segregates independently of colour in the vegetative parts. Two cases, 
however, have been found in which segregationin Fy, is into 1 red: 2 pale 
red : 1 white, and in one of these, the white are of two sorts, in equal 
numbers. In the other, the colour in the grain has been proved to be due 
either to the same factor which is responsible for colour in the ligule, or 
to a factor completely linked with this factor. The fact that there are 
found a few cases of plants with coloured ligules and white grains, is 
evidence in favour of the latter view. 
Colour of ripe glumes. 
The colour of the ripe glumes of rice, ¢.e., the husk, is generally some 
shade of yellow, red or black, or a mixture of these. The colour is often 
uniform, but piebald grains are frequent. 
These ripe glume colours have been studied in all the seven varieties 
discussed above with reference to colour in the vegetative parts, and those 
in which definite results have been obtained are described below, together 
with a few others. 
1. Variety Pankhiraj x Pookhi. Variety Pankhiraj ripens brownish- 
black ( Fig. 1); variety Pookhi ripens yellow-brown. On crossing, the 
ripe F, glume is like Pankhiraj, brown-black, and in F, segregation is 
complete into 3 Pankhiraj glumes : 1 Pookhi glume. Actual figures obtained 
are given in the table. 
KE. : 
Parents Brown-black : Yellow-brown Ratio 
Pankhiraj x Pookhi 69 : 26 
157 52 
206 57 
93 23 
