SELECTIVE FERTILIZATION IN POLLEN MIXTURES. 



273 



POLLEN MIXTURE No. i. 



POLLEN MIXTURE No. 2. 



The results, taken as they stand, are the same as obtained 

 from maize. There is a deviation favoring the plants' own 

 pollen of 2.06 and 6.84 per cent., in the two cases with the prob- 

 ability values .907 and .082 respectively. In the first instance 

 the difference can easily be due to random sampling, in the other 

 the odds are strongly against such an explanation. In view of 

 the fact that differences in germination of the seeds and viability 

 of plants most certainly tend to decrease the proportion of self- 

 fertilized individuals, the data have some value. They should 

 be corroborated by larger numbers using other characters which 

 can be more surely identified before they are as convincing as the 

 results with maize. 



