54 



1. NAOAI : 



The rest of the F^ £imilies agreed ^\Uli llie expectation except tbi-ee which 

 were apparently contaminated by accidental crossing ; hence they were dis- 

 carded. The actual numbers are given in Table 34. See also Table 29. 



(c). Tlie Cross: Buff x Black. 



The colour of the seed coat of a variety " "WiU'e-mame " is buff, and 

 that of a variety " Achummi " is solid black with pacuHar mesh-like, white 

 marldngs Mhich are due to the small breaks of the epidermal tissue exposing 

 the colourless, underljiug tissue of the seed coat (see Plate I). Tha F^ seeds 

 born on the F^ plant of the hybrid between them were self black. In F^ 

 seh IJacks, imperfect blacks, and browns were found ■v^ith the fjllowiug 

 number.^. 



Taule 24. 



Showing the result obtainerl in the Fj generation of the 

 cross " W.-iremame " x " Achumiiri." 



The expected ratio is 9:3: 3 : 1. Tlu buff wtis not found in tha F^ plauts 

 owing to the small number of individuals. In F,,, families derived fi'om the 

 heterozygoits self blacks, bufls were found in the expected ratio. 



Table 25. 



Shijwing the result obtained in Kj families deriwd from the 

 hctei'ozygoii.s self black Fi plants. 



