RESULTS OF SELECTION WITH SELF-FERTILIZED CROPS 121 



TABLE XIX. SELECTION EFFECT DURING Six GENERATIONS IN LINE I 

 OF PRINCESS BEANS 



Fruwirth (1917) made selections within a pure line of each of 

 the following: lentil (Lens esculenla), vetch (Vicia saliva), 

 snap bean (Phaseolus vulgaris), field pea (Pisum arvense), and 

 white mustard (Sinapis alba), but failed to change significantly 

 the mean of the character subjected to selection. In other 

 words, the genotype was not altered. Fruwirth also conducted 

 experiments within pure lines of oats. He selected for number 

 and length of hairs on the lower grain in addition to selecting 

 for percentage of two-grained spikelets per plant. The work was 

 carried on from 1906 to 1915 without effecting permanent altera- 

 tion in the hereditary complex. Table XX taken from Fruwirth, 

 illustrates a typical case. 



TABLE XX. SELECTION FOR PERCENTAGE OF BRISTLING IN OATS 



Minus selection 



Plus selection 



1 Practically no bristles. 



2 Mean error. 



