A. St Clair Oaporn 277 



Non-coloureds throwing 



80 particoloured : 294 non-coloured 

 80 „ :216 



160 „ : 510 „ =1:3 (^""^ 3 : IsV 



\ or / 



While another had 



105 particoloured : 204 non-coloured, 



which is probably equal to 7 : 9 as the classification would err on the 

 side of the non-coloureds \ 



Again this is a point of similarity to the wheat : the non-coloureds 

 shown in Table IV behaved in this manner. 



In brief, then, the ' streaked ' and ' non-coloured ' aspect of the 

 wheat cross in its relation to the same in the two maize families can 

 be synopsised thus : — 



Resemblances to 1st cross. Streakeds (particoloureds) throwing 



All particoloureds. 



3 particoloureds : 1 non-coloured. 

 Resemblances to 2nd cross. Streakeds (particoloureds) throwing 



3 particoloureds : 1 non-coloured. 

 Non-coloureds throwing 



1 particoloured : 3 non-coloureds ( 3 : 13) 



i „ + 1 ,, (approx.). 



The outstanding point is that in one and the same cross (wheat) 

 the inheritance of streaking gives support to two separate, radically 

 opposed theories on the transmission of particolouring (maize). The 

 conclusion is either that one of these two schemes is incorrect and the 

 other as yet imperfectly elaborated, or that both are incomplete ways 

 of expressing what may be in reality two kinds of particolouring de- 

 pendent on the same system. The evidence of this paper seems to 

 support the latter idea. For as at present expressed by East and 

 Hayes, although each does so in part, neither hypothesis by itself will 

 fit the wheat cross completely. On the cP hypothesis the origin of 

 streakeds from non-coloureds is left unexplained, while the full flushed 

 purple of the ^i grains and the failure of F2 non-coloureds to throw 

 flusheds are against the presence of the usual type of inhibitor. To the 



1 East aud Hayes, p. 96. Table 25 A. 

 Journ. of Gen. vii 19 



