160 CORRELATION OF COLOUR CHARACTERS IN RICE 
relation to each other, that most interest attaches to them. We give in the 
Appendix (I) a table showing the various combinations of colour characters 
which have been found in 211 varieties critically examined. On examination, 
it is found that certain combinations occur more frequently than others, while 
on the other hand certain combinations are never found. The most frequent 
combination is that of the leaf-sheath and apiculus of the inner glumes. This 
combination occurs together in 162 varieties out of the 211 examined. The 
next most common combinations are the leaf-sheath, internode and apiculus 
which are found together in 154 varieties, and the leaf-sheath, apiculus and 
stigma occurring together 98 times. Conversely, it is to be noted that certain 
combinations are absent, e.g., colour in the leat-sheath and stigma is never 
found without colour in the apiculus, though the apiculus may be coloured 
without colour in the leaf-sheath or stigma. It is therefore to be expected 
that, on crossing with colourless varieties, these combinations will ordinarily 
be found to stick together as patterns, while, conversely, other combinations, 
which should be found if independent segregation is taking place, will be 
lacking. This has been found to be the case. 
In the experiments detailed below, the following combinations have 
heen worked with (cf. Appendix IT) :— 
1. Variety Pankhiraj—coloured* leat-sheath, coloured apiculus; 
coloured stigma (Fig. 1). 
to 
Variety Matichak—coloured leaf-sheath, coloured  apiculus, 
coloured stigma (Fig. 2). 
3. Variety Noachur—coloured leaf-sheath, internode, outer glumes, 
inner glumes, apiculus, stigma (Fig. 3). 
4. Variety Muramagar—coloured leatf-sheath, ligule, internode, outer 
glumes, inner glumes, apiculus, stigma (Fig. 4). 
5. Variety Surjamukhi—coloured leaf-sheath, internode, outer glumes, 
inner glumes, apiculus, stigma (Fig. 5). 
6. Variety Bailabakri—coloured leaf-sheath, internode, pulvinus 
and auricle, outer glumes, inner glumes, apiculus, stigma 
(Fig. 6). 
7. Agartollah—coloured leaf-sheath, internode, pulvinus and auricles, 
ligule, outer glumes, inner glumes, apiculus (Fig. 7). 
The first six have in each case been crossed with a wholly green variety, 
Pookhi, while the seventh has been crossed with a green variety, C 25, and 
* In the descriptions the word ‘ coloured’ only is used, but the colours themselves vary, 
and the exact shade of coiour can be seen by a reference to the plate. 
