70 
I. N AG AI 
Table 30. 
Showing the result obtained in of the cross “ Waremame ” x “ Achumuri ” 
See also Table 35. 
Ft plant 
phenotype 
genotype 
no. 
observed 
of families 
expected 
diff. 
(ob. —exp.) 
Black 
CCER 
' 3 
2.875 
+ 0.125 
yy 
CcEE 
8 
5.750 
+2.250 
r> 
CCEr 
6 
5.750 
+ 0.250 
yy 
CcEr 
15 
11.500 
+ 3.500 
Black imp. 
ccER 
2 
2.875 
-0.875 
yy 
ccEr 
6 
5.750 
+0-250 
Brown 
C'C'rr 
3 
2.875 
+0.125 
yy 
CC'rr 
3 
5.750 
-2.750 
Buff 
cat'r 
0 
2.875 
-2.875 
Tlie different colour types of the soy bean seed coat so far concerned 
constitute the following series wdien they are arranged according to dominancy : 
blue tinged green > blue tinged yellow r > green > yellow > black > imperfect 
black > browns (lighter brown > deeper brown) > buff. 
It is of interest to compare the case of the soy bean to that of the 
Adzuki bean which have been investigated by Takahashi and Fukuyama 
(1917) 1 . They have shown that the different colour types behaved strictly in 
accordance with Mendelian principle as iu the case with the soy bean. The 
different types can be arranged, according to dominancy, as follows : Blue 
black >black>black flecked (“ Yogore ”)> black flecked red >greenish grey> 
deep buff (“ Clia ”) >red (self) >red-eyed white > white. 
The test for the chromogenic substances already remarked (see Table 8) 
shows that the chromogenic substance P and F are present in the green, 
unripe beans of all the coloured types but absent in white which is a “ warm 
buff” according to the nomenclature by Brno way. White is the most recessive 
character in the series. In the case of the soy beau, the types which show 
verp little chromogen content are green and yellow which are dominant over 
the types rich in the chromogenic substance. The difference in the genetical 
1. Takahashi, Y. and Fukuyama, J. Morphological and Genetio Studies on the Adzuki-bean. 
Hokkaido Agric. Exp. Station, Japan. Report 7, pp. 161 (in Japanese). 
