A OliNETICO-l'HY.SIOLOGICAL STUDY ON THE FORMATION ETC. 



35 



IL Genetical Study. 



1. The Mode of Inheritance of Anthoctanin and Brown 

 Pigment in the Awn and other Parts 



in ORYZA SATIVA. 



In the preceding chfiptei-s, certain physiological relations in the formation 

 of anthocyanin and the reddish brown pigments to the chromogenic substances 

 are discuased. We shall now crjusider the genetical factor's relating to the 

 formation of these pigments in the awn, paleas, glumes and the grain of 

 Oryza sativa. 



(a) Colom- Types of the Awn. 



Among the number of cultivated varieties of Orym sativa var. idilissima 

 and 0. fi. vai'. (jhdinosa, many ai'e awned. They may be gi'ouped under the 

 following types with respect to the colom- of the awn. 



1. Awn with anthocyanin. 



a. Pm-ple. 



b. Refl. 



2. \.v;u without anthocyanin. 



