434 Report of the Department of Hokticultuke of. the 



the third generation is not known, since no records of the mother 

 plants were kept. If dwarf plants had not appeared in the third 

 generation, one could have rightly assumed that its parents had 

 been all homozygous standards, but as dwarfs did appear, one or 

 more of the mothers must have been heterozygous. The law 

 of probability favors more than one heterozygous mother, for the 

 second generation from which the third generation was obtained 

 should have had two heterozygous plants to every one of its 

 homozygous plants, and, as already stated, at least four mothers 

 were used. Unfortunately, the exact number of dwarfs was not 

 recorded, for then one could make a rough estimation on the 

 number of heterozygous individuals. However, if the amount of 



TAiiLE III. — Yield of Tomatoes from Parent Varieties and from F„ F, 



AND F, Seedlings. 



* The low number of plants grown in this generation is due to an accidental picking 

 of seed fruits in the greenhouse. 



