IN THE TROPICS: III. 



1G5 



considerable proportion of cases, the yellow or white colour of 

 the endosperm could often be distinguished. In other grains 

 however the blue colouration was too deep for this to be possible. 

 The blue grains in this generation did not show mottling. 



That yellows are too numerous and whites too few as com- 

 pared with the expected number is partly due to the fact that a 

 small number of the palest yellows — counted as yellow — 

 should really be placed among the whites, as the evidence of 

 later generations shows. Compare Expt. 54, F 3 and F 4 . 



Total 8,649 42-46 12'75 261 8-67 7*95 2*0 



Expectation (taking 

 Blacks as 55- 22 per 

 cent, the value found) 415 



138 



25-1 



8-4 



84 



2-8 



F3. 



Grains showing each of the six combinations of characters 

 were sown and pollination was effected from G. W. S. The 

 plants were very weak and yielded for the most part only a 



