ARIZ0NA Agricultural Experiment Station 605 



which were approximately the same as that of the F2 genera- 

 tion. Late selections were also made in planting the third and 

 fourth generations, and late races have been separated which 

 are as late as the late parent (Turkey). A large number of 

 true breeding intermediate races have also been separated, indi- 

 cating that it is possible to fix a race with any degree of inter- 

 mediacy with regard to earliness, provided a sufficiently large 

 number of F, plants are grown. 



