Vincent: Apple Breeding in Idaho 



455 



Cross N umber 



Female Male of Trees 



Ben Davis x Jonathan 508 



Jonathan x Ben Davis 1,042 



Ben Davis x Wagener 181 



Wagener x Ben Davis 551 



Jonathan x Wagener 175 



Wagener x Jonathan 485 



Jonathan x Spitzenberg 57 



Spitzenberg x Jonathan 66 



1913. Ill the spring of this year, 

 2,823 crosses were made. One thou- 

 sand four hundred and seventy healthy 

 trees grew from these crosses. The 

 following table shows the ntmiber of 

 seedlings secured from each cross: 



Cross N umber 



Female Male of Trees 



Jonathan x Ben Davis 603 



Jonathan x Wagener 500 



Ben Davis x Jonathan 3 14 



Ben Davis x Wagener 53 



1914. During this year, 2,527 crosses 

 were made. From this number 4,544 

 healthy seedlings were grown. 



Cross Number 



Female Male of Trees 



Gravenstein x Newtown 22 



Gravenstein x Jonathan 20 



Spitzenberg x Ben Davis 153 



Spitzenberg x Rome 28 



Spitzenberg x Jonathan 80 



Spitzenberg x Newtown 66 



Spitzenberg x Wagener 238 



Ben Davis x Spitzenberg 107 



Ben Davis x Wagener 23 



Ben Davis x Rome 147 



Ben Davis x Newtown 57 



Jonathan x Spitzenberg 542 



Jonathan x Wagener 391 



Jonathan x Newtown 68 



Jonathan x Rome 42 



Jonathan x Arkansas Black 147 



Wagener x Spitzenberg 41 



Wagener x Rome 818 



Rome X Ben Davis 241 



Rome X Spitzenberg 337 



Rome X Wagener 326 



Rome X Newtown 631 



Arkansas Black x Jonathan 5 



Newtown x Spitzenberg 8 



Newtown x Wagener 6 



Summary: To date, there are 10,915 

 hybrid seedlings growing in our orchard 

 and station nursery. The total ntimber 

 of trees secured from each cross is as 

 follows : 



Female 

 Ben Davis 

 Ben Davis 

 Ben Davis 

 Ben Davis 

 Ben Davis 

 Ben Davis 

 Jonathan 

 Jonathan 

 Jonathan 

 Jonathan 

 Jonathan 

 Jonathan 

 Jonathan 

 vSpitzenberg 

 Spitzenberg 

 Spitzen])erg 

 Spitzenberg 

 Spitzenljerg 

 Wagener 

 Wagener 

 Wagener 

 Wagener 

 Rome 

 Rome 

 Rome 

 Rome 



Arkansas Black 

 Newtown 

 Newtown 

 Gravenstein 

 Gravenstein 

 Delicious 

 Winesap 



Cross Number 



Male of Trees 



X Jonathan 1,187 



x Spitzenberg 224 



X Wagener 266 



X Rome 147 



X Newtown 57 



X Ben Davis 2 



X Ben Davis 2,575 



X Wagener 1,066 



X vSpitzenberg 599 



X Jonathan 3 



X Arkansas Black . . . 147 



X Newtown 68 



X Rome 42 



X Ben Davis 274 



X Rome 28 



X Newtown 66 



X Wagener 238 



X Jonathan . 146 



X Ben Davis 835 



X Spitzenberg 41 



X Rome 818 



X Jonathan 485 



X Ben Davis 243 



X Spitzenberg 337 



X Wagener 326 



X Newtown 631 



X Jonathan 5 



X Spitzenberg 8 



X Wagener 6 



X Newtown 22 



X Jonathan 20 



X Jonathan 2 



X Ben Davis 1 



This material will give us a splendid 

 opportunity to study fundamental prin- 

 ciples, useful in plant breeding. We 

 are trying to find correlations and are 

 working along the lines recommended 

 by Luther Burbank. In a recent com- 

 munication from Mr. Burbank, he says : 

 "In selecting apple seedlings, my prac- 

 tice has been first of all to select those 

 which do not mildew — this can be 

 easily done while they are young. 

 This eliminates one of the worst quali- 

 ties in apple seedlings. Next, I thin 

 out all the very slender growers with 

 small deeply cut leaves. These always 

 tend back to the wild state. In the 

 next selection, I give preference always 

 to those having large fat round buds, 

 large thick leaves and a stocky growth." 



Such a procedure will enable the 

 plant breeder to discard undesirable 

 seedlings without having to grow each 

 plant through to maturity in order to 

 determine its characters. 



