18 



AN ANALYSIS OF THE EFFECT OF SELECTION. 



FiQ. 7. — Means and standard deviations for 868 inbred minus line. 

 Fig. 8. — Means and standard de^aations for crossbred minus line. 



Table 15. — Crossbred Minus Series. 



^From Fj of the inbred speck line described later. 



Table 16 and figure 9 show the result. The break after Fg represents 

 the same treatment as that given to the 1002 line (p. 10) — i. e., two 

 generations of unselected mass cultures. 



This line gives perhaps the clearest evidence of the effectiveness of 

 selection that we have yet observed. Reversed selection begun in 

 r2 was apparently also successful. Finally, the hue after F2 gives 

 consistently lower means than any other here recorded. 



