FRUIT BREEDING 



263 



and the length of time under cultivation of some of our most 

 highly prized fruit crops. 



TABLE LXVII. ORIGIN, PROBABLE LENGTH OF TIME OF CULTIVATION, AND 

 COMMENTS ON SOME CULTIVATED FRUITS (AFTER WHITE, 1916) 



A, cultivated for more than 4,000 years. 



B, cultivated for more than 2,000 years. 



C, cultivated for less than 2,000 years in the Old World. 



F, cultivated since the discovery of America. Often only very recently. 



The mode of origin of some of the better United States fruit 

 varieties has been compiled by Dorsey (1916) from the New York 

 Agricultural Experiment Station fruit monographs. A summary 

 statement is presented in Table LXVII I. 



These data show that nearly 85 per cent, of the commercial 

 fruit varieties of apple, cherry, plum, and grape have been obtained 

 by selecting promising chance seedlings, that one parent was 

 known for a little more than 10 per cent, of the varieties described, 



