CONTENTS xvii 



, PAOE 



The relation of science to plant breeding historical review 437 



The future relation of genetics and plant breeding 440 



Planning breeding operations in the light of scientific knowledge 440 



PART in 



Animal Breeding 



CHAPTER XXVII 

 THE GENERAL ASPECTS OF ANIMAL BREEDING 



Introductory . . 443 



The history of animal breeding 443 



The animal breeding industry 445 



The art of breeding 447 



The problems of animal breeding 447 



The service of genetics 448 



The service of genetics in education 450 



The personal equipment of the animal breeder 450 



CHAPTER XXVIII 



VARIATION IN DOMESTIC ANIMALS 



Introductory 453 



The sources of variation 453 



Selection as a cause of variation 454 



Variation by modifiability 454 



Modifiability and breeding value 456 



Modifiability and correlation 459 



Variation by recombination 459 



Mutation in domestic animals 462 



CHAPTER XXIX 

 MENDELISM IN DOMESTIC ANIMALS 



Introductory 465 



Importance of experimental breeding 465 



Mendelism in horses 465 



Mendelism in sheep 475 



Mendelism in swine 476 



Mendelism in poultry 476 



CHAPTER XXX 



ACQUIRED CHARACTERS IN ANIMAL BREEDING 



Introductory 480 



The problem 480 



The belief in the inheritance of acquired characters 482 



The argument against the inheritance of acquired characters 484 



