UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 195 
Contribution front the Bureau of Plant Industry 
WILLIAM A. TAYLOR, Chief < v 
Washington, D. C. 
PROFESSIONAL PAPER 
May 20, 1915 
POTATO BREEDING AND SELECTION 
By 
WILLIAM STUART, Horticulturist, 
Office of Horticultural and Pomological Investigations 
CONTENTS 
Introduction 
Potato Breeding and Selection Denned 
Limitations of Breeding and Selection 
Early Attempts at Potato Breeding . . 
Technique of Potato Breeding . . . 
Pollen-Producing Varieties .... 
Results of Experimental Crossing . . 
Reciprocal Crosses j 15 
Varietal Affinity 16 
Page 
17 
Potato Crosses Made in 1910 . . . 
Method of Growing and Testing Seed- 
lings 18 
Seedling Inheritance in the Fi Generation 20 
Potato Improvement by Selection ... 21 
Early Selection Experiments 22 
Selection Methods 27 
Departmental Investigations 29 
Summary • 35 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1915 
H2ZE2 
