86 



PLANT-BREEDING 



accidental crosses are occurring in their pure pedigree-cul- 

 tures, from time to time. 



Some instances may be given. Among the cultures of 



Fig. 25. Svalof oats with bending branches. 



pedigree wheat started from an initial selection made in the 

 year 1892, a race indicated by the book number 0608 distin- 

 guished itself by long and stiff culms, combined with an un- 

 usually good quality of the grains. But it had two notable 





