106 



White. 



families, it was necessary to take their flower records during approximately 

 the same blooming phase. 



Table F shows a study of 88 flowers collected from the same plant 

 at different intervals of time. The study is given here in order to 

 show the fluctuation there may be in dominance when environmental 

 factors enter, for the differences in the three lots are largely due to 

 this cause. 



Table F. Effect of environment on the expression of (A) 

 in an Fi hybrid plant. 



Variability of dominance. Table 13 is a comparison between 

 the average abnormal condition of the Fi flowers of the different crosses, 

 the data from all, except the first and last resting on a study of 

 25 flowers from each Fi individual of the respective hybrid families. 



324X301 appears to be the most abnormal, followed somewhat 

 closely by 303—1—24 X 332 and 304 X 402. The least abnormal Fi 



1) Field. 



^) Same field as Aug. 10. 



*) Greenhouse (richly fertilized soil). 



