84 



THE INHERITANCE OF CHARACTERS IN RICE 



The results of a further generation are shown in Table VI. 



Table VI. 



It is evident that the figures represent & 1 : 2 : 1 ratio and the patchy- 

 golds apparently form a heterozygous group intermediate between homozygous 

 greens and golds. It may be that this is due to an inhibitory factor incom- 

 pletely dominant for this type of gold, or possibly no inhibitory factor is 

 concerned but only an incompletely dominant gold-producing factor. 



Since the families of Tables V and VI were derived originally from the 

 same parent it is probable that the same inhibitory factor is concerned in both 

 lots and that the difference in effect is due to the different gold-producing 

 factors present. This supposition is supported by the fact that in one of the 

 pure green families of Table V there occurred one typical patchy-gold plant 

 which no doubt was a natural cross by a gold plant in No. 432 of Table VI 

 which was growing in the vicinity. Moreover in the pure green families of 

 Table VI there occurred one or two obvious crosses with entirely green glumes 

 and internode, due undoubtedly to the introduction of the ordinary inhibitory 

 factor from outside as has been already described for similar crosses in famihes 

 of Table V. 



(c) Dark furrows of inner glumes. 

 In this character a dark blackish -brown colour develops in the inner 

 glumes, more especially in the furrows (Plate I, iig. 4 and Plate II, fig. 4). 



