46 THE BOTANICAL MAGAZINE. [Vol. xxxvi. No. 424. 



Resume of the Original Article in Japanese. 



Tokio Hagiwara. The Inheritance of the Tube- Character in the 

 Morning Glory 



Classifying the flower-tubes of the Morning Glory by the distribu- 

 tion of their coloration, these are three kinds of tubes coloured all 

 over, partially and lightly at the bottom, the white ones besides. 



The following factor hypothesis founding on my experimental 

 evidence most suitably explains above tube-characters and other ex- 

 periment on these characters. 



C the factor for color in the corolla. 



c the factor for the white flower. 



Ti .... the factor for the tubes coloured to all over in spite 

 of the presence of the factor C. 



ti the factor for the partially coloured tube in the 



presenee of Cc, Cc and T2 T2. 

 T2 .... the factor forcing the influence of Ti or ti in the 

 presence of these factor. 



t2 the factor not having the above cooperative activity. 



The capital letter is dominant to the small letter. For example, 

 ±he totally coloured tube is CT1T2, the partial^ coloured one CtiT2, 

 and the lightly coloured one with only the obscure coloratirn at the 

 bottom, but has the coloration in the other part is CTiT 2 . The 

 totally colored one is a simple Mendelian dominant to the partial, 

 and to the light respectively. Morover, I have met with the fact 

 that a coupling having the gametic ratio 4 : I take places between 

 ti and t2. I recongnized that it is owing to a highest linkage be- 

 tween the factor (b) for some flower colour and the factor (t2) for 

 certaine flower-tube colours that Mr. Imai considered the phenomena 

 which some flower-colors almost always are accompanied by certain 

 flower-tube colors as due to either linkage or multiple allelomorphs. 

 The cross-over of the above linkage may be between 0A1% aud 2.22^. 

 According to the Chromosome Hypothesis, the loci of these factors 

 must be arranged linearly with the order of b, ti, t2, on the same 

 chromosome. 



