stout: pollinations in cichorium intybus 



379 



:s IS 



entire generation is 9-9 per cent. The third generation gave 46 

 self-sterile and 43 self-fertile plants; the average fertility of the 

 generation is 9.9 per cent and that of the self-fertile plants - 

 2 1. 1 per cent. _ _ 



^ TABLE 6 



Summary of Fi, F2 and F3 generations 



* One self-fertile plant not included in frequency distribution or in averages. 



It is quite evident that there is close agreement in the F2 and F3 

 generations both in the proportion of self-fertile plants and in 

 the average percentage fertility of the same. In both respects 

 these generations are decidedly higher than the Fi. A glance 

 at the distribution shows that in all three generations the distri- 

 bution is decidedly skew and rather irregular, with the largest 

 number of plants in the self-sterile class and in the classes showing 

 low self-fertility. In the Fi there were only two plants having 

 higher percentage of fertility than 13 per cent, and these show 



