Phenotypes of wheat plants following inoculation with selected stem rust races.

WT24, T25, T26, T46 are sublines descended from ‘Lakin’ progenitor generations that responded to virus pressure; p1, p2, p3 denote individual plants within sublines as source of seed.
XSeedlings analyzed for stem rust phenotype at Manhattan, Kansas at 20°C.
YResistant = 0;2 and susceptible = 34. For example,;2-C means a range of infection types from fleck (denoted;) to 2- (small to medium sized uredinia surrounded by necrosis or chlorosis). The minus (‘–’) denotes the low side of the range and the plus (‘+’) denotes the high side of the range. The C denotes extra chlorosis. Overall, the;2-C rating is a moderately resistant reaction.
ZControls: ‘Lakin’ [20], Chinese Spring, and KS09HW28 are susceptible in seedling stem rust assays against races while to stem rust races MCCFC, QFCSC, QTHJC, RCRSC, RKQQC, TPMKC, and TTTTF (Data from the 2010 Wheat Regional Germplasm Observation Nursery. Stem rust analysis conducted at USDA ARS, St. Paul, MN by Yue, Jin.). Published on line: (http://arslincoln.unl.edu/wheat), and ‘Chinese Spring’ [21] is the stem rust susceptible control and ‘Arkan’ the resistant control.