90 



CORN CROPS 



65. Mass Selection. — The result of mass selection in 

 corn is well illustrated by the history of any of the older 

 varieties, as Learning, Reid, or Boone County White. 

 After many years' selection, the breeder succeeded in 

 producing a more or less uniform type. 



For example, the Leaming variety was originated by 

 Mr. J. S. Leaming, of Hamilton, Ohio : ^ " After fifty-six 

 years' selection, Mr. Leaming produced a corn having as 

 variety characteristics a distinctly tapering ear, fairly 

 large butts, rather pointed but well-covered tips, with 

 kernels of a deep yellow color, with very irregular rows." 



Hartley produced a corn with twisted rows by select- 

 ing such ears from the field. At the Nebraska Agricultural 

 Experiment Station, a shallow-kerneled type of corn was 

 fixed by continuous selection after five years.^ 

 , 66. Pedigree selection. — A striking example has been 

 reported from the Illinois station.' Two sets of Leaming 



TABLE XIII 



General Averages of Crops produced in Corn Breed- 

 ing, FOR High Ears and for Low Bars 



1 Mo. Agr. Exp. Sta., Bui. 87 : 113. 



2 Nebr. Agr. Exp. Sta., Bui. US : 20. 

 ' III. Agr. Exp. Sta., Bui. 132. 1909. 



