88 



THE INHERITANCE OF CHARACTERS IN RICE 



Table IX, In all cases several localization factors were present, some pure, 

 others segregating, so that all plants capable of producing pigment must have 

 possessed a localization factor. 



Table IX. 

 Purple pigmentation, 9 : 7 ratio. 



The figures for these families are sufficiently definite to leave no doubt 

 that the formation of pigment is dependent on the simultaneous presence of 

 two factors. It must be assumed that all the above families, giving a, 3 : 1 

 ratio, were pure for one of these factors.* 



Confirmatory evidence of the existence of two pigmentation factors has 

 been obtained by the production of a pigmented plant by crossing two 

 unpigmented types. 



* Note : — Since this was written a paper has been published by Hector, " Observations on 

 the Inheritance of Anthocyan Pigment in Paddy Varieties," Mem. Dept. of Agr. in India, Bot. 

 Series, vol. VIII, no. 2. 



He has obtained both 5 : 2 and 9:7 ratios of pigmented: unpigmented, the latter being 

 more common. His interpretation of results differs from that adopted in the present paper in 

 that no distinction is made between pigmentation and localization factors. Such a distinction 

 would simplify the explanation of many of the results given ; thus all the families of Table III, 

 p. 94, might be considered to be segregating for two pigmentation factors and the stigma loca- 

 lization factor, but pure for the leaf-sheath and apiculus localization factors. [F. R. P.] 



