26o 



Toyama. 



and Asakanishiki) and tetravoltine (Onodahime) whites which were 

 proved to breed true to parents, while the latter (Italian white and 

 "Sma blanc''') a mixture of homozygous and heterozygous ones, as 

 is already shown. 



The result is tabulated below: 



Table V. 

 Crosses between Japanese and European whites. 



Of twelve white matings, seven yielded all white F^ broods, while 

 the rest gave mixed broods of white and yellow in an approximate 

 proportion of 1:1; a result similar to that of Japanese yellow x 

 European whites. 



If we represent Japanese recessive white by "uw", European 

 dominant white "\vw" and heterozygous dominant white "\vy" we 

 may expect to have the following gametic combinations in the above 

 matings. 



1. WW ;••; w%v = \\'w = all whites. 



2. WY X WW = Ww -j- wY = I white -|- i yellow. 



If a mating takes place between homozygous dominant and 

 recessive white, the result would be all white F^ (i), on the contrary, 



