A GENETICO-rilYSIOLOGIC.Ui STUDY ON THE FORMATION ETC. 



37 



Table 15. 



Chromogen content of the extmct of lenf in Ori/za sativa. 



The colour saile wns mnde by the flnvone isolated from the leftf of 



Ori/za in.stenc1 of queroetin. 



Frt'iinency of vnrietieH with res]ie<;t to tlio cijlunr 'if 



Ac<»rding to the spech'ogi'apliic investig.ition of Y. Shibata and Kijro- 

 TSUKI (1918)', the fibsoi-ption spectra of tho fluvone isolated fi'om the leaf of 

 Oryza sativa conformed to these of pm-e luteoliii. 



(b) Tlio Cross : Brown x Faint Yellow. 



Tlie lu-eediug expeiiments made Ijy the different investigators in Japan, 

 Imve ali-eafly shown that the hylnid between certain varieties having the 

 brown awn and the faint yellow, gave in i^, the i-ed a-mied plant. The red 

 coloiu' is due to anthocyauin. The segregation in I\ takes place by the ratio 

 9 reds, 3 browns and 4 faint yellows, otherwise the ratio is more complicated.^ 

 Tlie phenomena are in accord mth the well known cases of the flower in 

 Lcilhjrm in which the colourless types produce the coloured one in /'' . The 

 wiiter obtiiined the similar results by the following crosses, 

 "Daikkoto" x "Togo" 

 " Kiira-fnsjigi " x " Nagoya-shiro " 



The ch/xractei-s studied in tho alwve crosses are the following : 



1. Shibata, Y. and Kimot4T7ki, K., Sjiectro-analysis of the Plant Pigments of Flavone Group. 

 I. .Jour. Chem. Soc., Tokyo. 39.771, 1918. (In .Japanese) 



2. Some of the results obtained by Dr. Kato are briefly summerized in Ikexo, S., Zikken- 

 Idengakm. p. 84, 1918. .^so in Itotanic«l Abst. 2:114, Entry G79, 1919. 



