Frazier, W. A.
The dry summers and wet falls in Western Oregon permit rigorous testing of tomatoes for resistance to cracking. In the 1957 season cracking data on many breeding lines and varieties were secured. Lines were arbitrarily scored on a scale of 1-10, with 10 being most resistant. Readings were made October 13, after two weeks of almost continuous light rain. The most resistant breeding lines or accessions are compared below with a few common varieties.
Cracking Cracking
Variety or Line Index Variety or Line Index
OSC 284 (Wide calyx) 8 OSC 322 6
OSC 373 (Wide calyx) 7 OSC 351 6
PI180, 725 7 T-145 (F1 of two crack
OSC (dwarf) 7 resistant lines) 6
T-150 (F1 of two crack OSC 311 6
resistant lines) 7 OSC 251 (Wide calyx) 6
OSC 263 (dwarf) 7 T-120 (F1 of two crack
OSC (Wide calyx) 6 resistant lines) 6
Campbell 54 6 Calcross Hybrid 3
T-121 (F1 of two crack Pennheart 3
resistant lines) 6 Victor 4
OSC 262 6 Kokomo 5
SVBL 2924-4-A-1-A Glamour 4
(Accession 2620) 6 Bay State 4
OSC 250 (Wide calyx) 6 Big Early Hybrid 3
Valiant 2 Early Chatham 3
Firesteel 3 Queens 4
Sioux 4
Stokesdale 2
There were 287 varieties and breeding lines in the test so that the above
represents only a few of the susceptible types. All of the most resistant
lines are included, however, showing that under conditions conducive to
extremely severe cracking there were relatively few with high, resistance and
none were completely free of cracks.