114 



SCIENTIFIC AGRICULTURE. 



December, 1921. 



The Fj generation, in all cases, bore 

 hoods, the supernumerary florets being 

 almost sessile. In the F. generation tri- 

 fureated and awned forms were produced 

 in approximately the ratio of 3 to 1. In 

 the F, generation, 45 awned types were 

 tried and found to breed true; whilst the 

 same number of hooded types were tested 

 in which 16 bred true and 29 were found 

 to produce a mixture. 



Purple palea dominant over white palea. 



It is to be noticed that in several varieties 



of barley the palea is a deep purple in 



colour before the grain has quite ripened. 



but as ripening progresses the colour fades 

 and in the fully matured grain only a trace 

 is to be noticed. From various crosses wath 

 these two characters, the progeny in the 

 P\ and F3 generations followed the ratio 

 3 to 1. No intermediate shades were met 

 with, so that it can be said that the purple 

 shade is dominant over white in the palea 

 of barley. 



Coloured grain dominant over colourless. 



Tlie presence of colouring in the palea 

 appears to be associated with the colour of 

 the grain itself. In wheat, on the con- 

 trarv. the coloured or colourless eondi- 



BARLEY TYPES 



