CONTENTS 



Page 



Plant Improvement 1 



Definition of the Terms Bud Variation and Bud Selection 2 



Objects of Bud Selection 4 



The Origin of Varieties from Bud Mutations 4 



The Isolation of Strains in Established Varieties 12 



The Elimination of Undesirable Strains 15 



The Amelioration of Varieties and Strains Through Bud Selection 15 



Individual Plant Performance Eecords 16 



The Commercial Utilization of Individual Plant Eecords ^ 20 



The Selection of Superior Parent Plants 21 



Progeny Tests 21 



The Scientific Study of Bud Mutations and Bud Selection 22 



Pioneers in Bud Mutation and Selection Work 22 



Summary 23 



Literature Cited 24 



Explanation of Plates 27 



