Effect of fertilization with Pollen of Different 

 Degrees of Relationship. 



As the results of previous experiri^ents Indi- 

 cated that the manner In which a flower Is fertilized 

 has something to do with the percentage of pods and 

 the numher of seeds formed per pod, an experiment was 

 planned and carried out In 1909 to obtain more definite 

 Information in regard to this problem. On six selected 

 plants a portion of the flovvers were tripped with a 

 rough piece of string, each flower being tripped alter- 

 nately with the flowers of one of the other plants. In 

 this way there was opportvmlty to fertilize each flower 

 with pollen from another plant. On three of these plants 

 the remaining flowers that had been tagged were tripped 

 with pieces of grass or alfalfa stems. As a separate 

 stem was used for each flower, each stigma received pol- 

 len only from the same flower. On each of the other 

 three plants, a portion of the flowers were tripped by 

 pressure from the outside In such a way that no external 

 object cane in contact v/ith the stigma, thus preventing 

 cross fertilization. The results are presented in 

 tables YII and YIII. 



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