Kew York Agricultural Experiment Station. 469 



In the Ben Davis X Mother apples there are seventeen appar- 

 ently pure reds and three individuals evidently heterozygous for 

 yellow and red. These three heterozygous apples might, how- 

 ever, vuider different circumstances, as for instance with a longer 

 season and more favorable soil conditions, develop a more intense 

 red, or in accordance with the assumption made, they may con- 

 tain a red which is less complex in organization than that of 

 their sisters. 



The Sutton X Xortherii'Spy progeny furnishes five individuals, 

 three of which are classed as red and two as yellow. This segre- 

 gation indicates Mendelian splitting, though the numbers are too 

 few to more than suggest that the red is dominant and the yellow 

 recessive. The yellow individuals, however, may not be pure 

 recesslves for a light reddish tinge was present on a few speci- 

 mens of both trees. Does this reddish tinge signify that red 

 individuals will appear in future generations if the variety be 

 selfed, or is the red due to some physiological condition ? Cer- 

 tain varieties, as the Yellow Transparent and Early Ripe, do not 

 have this very light blush of red or bronze, but among all of our 

 present crosses, no true yellows have appeared. Although we do 

 not know whether one unit of red is contained in these yellow 

 individuals, we suspect that both Sutton and Xorthern Spy must 

 carry yellow as a recessive. This view is substantiated by the 

 fact that in the other crosses in which Xorthern Spy is a par- 

 ticipant, heterozygous individuals appear which evidently carry 

 yellow. 



The Rome X ^N'orthern Spy produced only one seedling and 

 this is classified as an intermediate in color. 



Ralls X Xorthern Spy gave nine seedlings, seven of which are 

 classified as red, and two as heterozygous for red and yellow. 

 It is probable from this cross that Ralls does not carry yellow 

 as a simple unit character, for if it did, yellow individuals 

 should have appeared. 



Ben Davis X Esopus gave three red and one heterozygous red, 

 and the reciprocal cross gave the same two classes, but in the pro- 

 portion of eighteen to eleven. The difference in the ratios for 

 these two crosses is, of course, of no significance, owing to the 

 few individuals in the first. As there was no evidence of a re- 



