252 University of California Publications in Agricultural Sciences [Vol. 2 



In the last item in table 1 both bald and glandular plants are 

 recorded. Tliis is as it should be, for the 19.113 plant was an Fj 

 glandular plant produced by crossing the Swedish bald race (19.235) 

 Avith a Eureka glandular race (19.224), If the bald gene in the 



TABLE 2 

 Fi Eesults from Crosses of BB X bb 



TABLE 3 

 Back Crosses of the Fi Bb to bb 



cultures from Sweden and from the Azores were identical, we should 

 expect to obtain from such a back cross 50 per cent glandular and 

 50 per cent bald plants. The 5 to 7 segregation obtained is a close 

 approximation to the expected 1 to 1 ratio. While the Copenhagen 

 race has not been crossed with the Cambridge race, nor the Chilean 



