118 Tomato YSTONE Main Uses Days 
WISCONSIN 55 (Red) Cc 75 
A large fruited, productive, second early tomato developed by Dr. J. C. Walker of the 
University of Wisconsin for the main crop in the short season of Northern production 
areas. Good canning quality. 
VINES—Medium large, spreading, with fair foliage cover. 
FRUIT—Medium to large size, slightly flattened to near-globe shape. Thick walls, meaty 
flesh, firm, small seed cavities, scarlet red color. 
YELLOW PEAR (Yellow) H 75 
Popular as a home garden or preserving variety. Large vine, bearing large racemes 
of small, pear-shaped, golden colored fruit. 
HYBRID 
A good tomato hybrid is the result of hundreds of trial crosses and years of testing. 
Several F, hybrids on the market (including ours) have shown enough advantages in 
early vigor, uniformity, yield, and other characteristics to justify their use by commer- 
cial growers, in spite of the high cost of the seed. 
F, seed is produced by planting the F: and allowing normal pollination. Segregation of 
plant and fruit characters takes place, and the resulting stock actually shows a mixture 
of closely related type characters. This is admittediy a compromise, whose purpose is to 
reduce seed cost. The plants perform well in the field, however, since much of the origi- 
nal hybrid vigor is retained. Large acreages for canning are planted with F. seed. 
In order to minimize the effects of segregation, it is necessary to cross two parents cf 
similar type, for F. production. Since the greatest hybrid vigor usually comes from cross- 
ing parents of different types, the Fy’s still hold a considerable advantage. 
Dislodging pollen from a tomato flower—this vibrating apparatus was devised by a 
Corneli plant breeder for tomato hybridizing, 
