Table 3. Virulence frequencies (%) of Puccinia triticina in the U.S. in 2006 to 20 differential lines of Thatcher wheat with leaf rust-resistance genes. Areas are described in Figure 3.

 Resistance gene  SE  NE  OH Valley  TX - OK  KS - NE  MN SD ND  CA  WA  U.S. Total
 #  %  #  %  #  %  #  %  #  %  #  %  #  %  #  %  #  %
 Lr1 143 100.0 34 97.1 59 100.0 205 99.5 30 100.0 231 100.0 4 100.0 10 100.0 716 99.7
 Lr2a 91 63.6 4 11.4 30 50.8 119 57.8 15 50.0 148 64.1 0 0.0 0 0.0 407 56.7
 Lr2c 93 65.0 4 11.4 30 50.8 119 57.8 15 50.0 148 64.1 0 0.0 0 0.0 409 57.0
 Lr3 143 100.0 34 97.1 59 100.0 205 99.5 30 100.0 228 98.7 4 100.0 10 100.0 713 99.3
 Lr9 14 9.8 2 5.7 7 11.9 46 22.3 6 20.0 22 9.5 2 50.0 0 0.0 99 13.8
 Lr16 0 0.0 0 0.0 0 0.0 3 1.5 0 0.0 43 18.6 0 0.0 0 0.0 46 6.4
 Lr24 80 55.9 21 60.0 30 50.8 146 70.9 18 60.0 161 69.7 0 0.0 0 0.0 456 63.5
 Lr26 48 33.6 32 91.4 32 54.2 50 24.3 13 43.3 50 21.6 2 50.0 7 70.0 234 32.6
 Lr3ka 43 30.1 13 37.1 26 44.1 46 22.3 6 20.0 41 17.7 0 0.0 2 20.0 177 24.7
 Lr11 34 23.8 11 31.4 24 40.7 13 6.3 0 0.0 10 4.3 0 0.0 3 30.0 95 13.2
 Lr17 36 25.2 14 40.0 19 32.2 87 42.2 15 50.0 78 33.8 4 100.0 7 20.0 260 36.2
 Lr30 43 30.1 13 37.1 26 44.1 45 21.8 6 20.0 40 17.3 0 0.0 2 20.0 175 24.4
 LrB 35 24.5 14 40.0 16 27.1 85 41.3 15 50.0 75 32.5 4 100.0 7 70.0 251 35.0
 Lr10 141 98.6 34 97.1 59 100.0 206 100.0 30 100.0 230 99.6 4 100.0 10 100.0 714 99.4
 Lr14a 137 95.8 35 100.0 55 93.2 179 86.9 30 100.0 174 75.3 4 100.0 10 100.0 624 86.9
 Lr18 25 17.5 3 8.6 13 22.0 0 0.0 0 0.0 4 1.7 0 0.0 0 0.0 45 6.3
 Lr21 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
 Lr28 108 75.5 21 60.0 43 72.9 125 60.7 15 50.0 157 68.0 0 0.0 7 70.0 476 66.3
 Lr41 9 6.3 2 5.7 5 8.5 17 8.3 0 0.0 8 3.5 0 0.0 0 0.0 41 5.7
 Lr42 17 11.9 5 14.3 11 18.6 69 33.5 13 43.3 53 22.9 0 0.0 0 0.0 168 23.4
 Total 143   35   59   206   30   231   4   10   718