104 



THE INHERITANCE OF CHARACTERS IN RICE 



segregation have been examined, but, with only one exception, it has been 

 impossible to separate them into distinct groups without all stages of hiter- 

 mediates. 



The exceptional family resulted from a naturally occurring heterozygous 

 plant, No. 162, with light reddish-brown rice (Plate V, fig. 4). In Fo the same 

 type appeared together with pure white. The groups, which were absolutely 

 distinct, showed the ratio light reddish -brown 109 : white 42, presumably repre- 

 senting a, 3 : 1 ratio indicating the simple dominance of this character. 



COIMBATORE, ] 



February 14, 1917. / 



POSTSCRIPT. 



Since this paper was written a careful examination has been made of 

 a later crop comprising a number of F4 families from No. 553, F3 of Table XX. 

 When the character of the rice was noted in conjunction with other segregating 

 characters it was seen that all red-riced plants were pvrjjle-jrigmented whereas 

 all plants wdth grey-brown rice were unpigmented. 



Table XXI gives the numbers for five families showing segregation, for 

 both pigmentation and rice colour. It will be seen that a very definite 

 : 3 : 3 : 1 ratio results from a 3 : 1 ratio of jjigmettted : impigmeHfed, together 

 with a 3:1 ratio of red : white in the former group and of grey-brown : 

 ■white in the latter group. 



Table XXI. 



