200 THE INHERITANCE OF CHARACTERS IN RICE, II 
and a simple 3: 7 ratio of normal : dwarf was the result, the actual numbers 
being 1248 : 597. The dwarfs were absolutely distinct from the normals and, 
apart from a slight increase in vigour, were identical with the dwarf parent in 
all its peculiarities. The normals were entirely normal and showed no trace 
of any of the dwarf characters. Plate IV shows photographs of the two types 
appearing in Fo. 
it is obvious that a single factor is concerned in spite of the great differ- 
ences in a number of parts of the plant. 
Certain colour characters and a glutinous rice character introduced into 
the cross showed the male parent to be a type, EK. B. 303, that was growing 
alongside the dwarf variety in the season when the cross occurred. It is 
possible, therefore, in giving certain measurements for Fy, to compare these 
with the corresponding measurements of both parents. 
Table XI shows the range of variation in height of the normal and dwarf 
groups of F, together with that of a certain number of plants of both parents. 
The height measurement was taken from ground level to the top of the heads 
gathered together in a bunch. 
TABLE XI. 
Segregation for height in Fy No. 2666 N. 
Normal x Dwarf. 
NUMBER OF PLANTS 
F, Parents 
Height in inches 
: E.B. 303 | E. B. 304 
Normal | Dwarf normal dwarf 
rare 
26 ¥; 14 a | 10 
30 Se 166 nr. 30 
34 il 186 04 
38 | 25 ae 
42 LOY} nf 5 
46 165 af 26 
50 533 He 51 
54 429 sh 42 
58 106 si ri 
62 5 eye ot Se 
Average height 50°5” 31:2” 49:7” 27:9” 
The figures show the very distinct nature of the segregation, the shortest 
of the normal group being taller than the tallest dwarfs. 
