968 



PLANT BREEDING 



Table I. 



white oats, the Probsteier is somewhat superior to the two German types, 

 but the latter nevertheless represent very good varieties particularly adapt- 

 ed to peat soils 



748 - Strawberry Breeding in the United States. — Tin- jounud of Hcnd'iy, Voi. vii. 



No. 4, p. 191. Washington, April 1916. 



Probably with no single fruit has more been accomplished b}- scienti- 

 fic breeding than with the strawberry. Of the 200 000 acres or thereabouts 

 which are planted to strawberries in the United States, it is probable that 

 90 % are planted to varieties which have been produced during the last 

 quarter of a century. 



Strawberries have been grown in the United vStates ever since the coun- 

 try was first settled, but the original strains bore fruit only in the earl)^ 

 summer. One of the greatest advances in the industry was the introduc- 

 tion of the fall-bearing or ever-bearing varieties, the first of which was Pan- 

 American, produced by Samuel Cooper, of Delevan, N. Y., in 1898. This 

 was a sport from the variety Bismarck, which bore only in the early summer. 

 Mr. Cooper produced a number of seedlings by self-fertilization from this 

 sport and then crossed them with each other and back on the parent. In 

 this way a number of other more desirable varieties were obtained. Cross- 

 ing Pan-American with Dunlap (Senator Dunlap), a widespread and fa- 

 mous variety, PIarlow Rockhill, of Conrad, Iowa, produced in 1908 the 

 variety Progressive, which has proved one of the most popular in the 

 northern States. 



