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Results from single marker regression analyses of adjusted southern leaf blight phenotypic values on marker genotypes. Positions of markers are given in intermated B73 × Mo17 (IBM) cM units. For each marker tested, the R2 value, additive effect (a), and dominance effect (d) are given. Values are in terms of the standardized scores calculated as number of standard deviations from the mean (see Materials and Methods). Negative additive effects indicate that the Mo17 allele increased resistance. Positive dominance effects indicate that heterozygotes have lower resistance than the midparent value. p values associated with a and d are given in parentheses. Empty cells indicate unavailable marker information.

 
Marker Position B73 NIL F2:3's Stuber NIL F2:3's IBM Stuber RILs All populations combined
umc1772 163.5 R2 = 0.52 R2 = 0.38 R2 = 0.19 R2 = 0.060 R2 = 0.21
a = −0.89 (<0.0001) a = −0.78 (<0.0001) a = −0.44 (<0.0001) a = −0.23 (0.0093) a = −0.48 (<0.0001)
d = 1.36 (<0.0001) d = 0.60 (0.0487) d = 0.61 (0.2268) d = 0.66 (<0.0001)
PHM12576 165 R2 = 0.58 R2 = 0.47 R2 = 0.25
a = −0.96 (<0.0001) a = −0.87 (<0.0001) a = −0.54 (<0.0001)
d = 1.30 (<0.0001) d = 0.76 (0.0123) d = 0.74 (<0.0001)
umc1425 165 R2 = 0.55 R2 = 0.41 R2 = 0.22 R2 = 0.10 R2 = 0.23
a = −0.93 (<0.0001) a = −0.82 (<0.0001) a = −0.49 (<0.0001) a = −0.32 (0.0003) a = −0.53 (<0.0001)
d = 1.32 (<0.0001) d = 0.58 (0.0388) d = 0.46 (0.0944) d = 0.70 (<0.0001)
umc2000 166 R2 = 0.55 R2 = 0.37 R2 = 0.20 R2 = 0.084 R2 = 0.22
a = −0.95 (<0.0001) a = −0.77 (<0.0001) a = −0.44 (<0.0001) a = −0.28 (0.0021) a = −0.50 (<0.0001)
d = 1.24 (<0.0001) d = 0.66 (0.0214) d = 0.65 (0.1925) d = 0.70 (<0.0001)
umc2158 176.6 R2 = 0.50 R2 = 0.36 R2 = 0.083 R2 = 0.047 R2 = 0.16
a = −0.90(<0.0001) a = −0.76 (<0.0001) a = −0.30 (<0.0001) a = −0.19 (0.0377) a = −0.41 (<0.0001)
d = 1.12 (<0.0001) d = 0.72 (0.0144) d = 0.90 (0.1242) d = 0.68 (<0.0001)
umc1392 181.1 R2 = 0.50 R2 = 0.35 R2 = 0.068 R2 = 0.044 R2 = 0.14
a = −0.90 (<0.0001) a = −0.75 (<0.0001) a = −0.26 (<0.0001) a = −0.19 (0.0385)d = 0.44 (0.1797) a = −0.39 (<0.0001)
d = 1.12 (<0.0001) d = 0.68 (0.0170) d = 0.68 (<0.0001)
PHM4145 181.7 R2 = 0.50 R2 = 0.30
a = −0.93 (<0.0001) a = −0.67 (<0.0001)
d = 1.10 (<0.0001) d = 0.70 (0.0223)
PHM14098 190.8 R2 = 0.28 R2 = 0.18
a = −0.67 (<0.0001) a = −0.59 (<0.0001)
d = 1.32 (<0.0001) d = 0.14 (0.6704)
PHM13823 213.6 R2 = 0.068 R2 = 0.24
a = −0.37 (0.0032) a = 0.76 (<0.0001)
d = 1.34 (0.0016) d = 0.26 (0.5821)
PHM6836 260.1 R2 = 0.015 R2 = 0.30
a = −0.16 (0.2081) a = 0.83 (<0.0001)
d = 0.64 (0.1180) d = 0.08 (0.8649)
PHM12861 305.8 R2 = 0.018 R2 = 0.021
a = −0.20 (0.3361) a = 0.02 (0.8664)
d = −0.96 (0.3687) d = −0.56 (0.1339)
NIL, near-isogenic line.
IBM, intermated B73 × Mo17.
§RIL, recombinant inbred line.



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Log of odds (LOD) scores for both real and virtual markers in both combined and single population analyses. Virtual markers are located at the midpoints of adjacent real markers and at 0.1 cM intervals for the purpose of defining support intervals.

 
Marker Position All populations combined B73 NIL F2:3's Stuber NIL F2:3's IBM Stuber RILs
umc1772 163.5 37.5 24.6 14.1 13.5 2.0
umc1772/PHM12576 midpoint 164.25 42.3 25.8 14.5 15.5 2.9
PHM12576 165 44.4 25.9 14.7 16.4 3.6
PHM12576/umc1425 midpoint 165 44.4 25.9 14.7 16.4 3.6
umc1425 165 44.4 25.8 14.7 16.4 3.6
umc1425/umc2000 midpoint 165.95 42.9 26.3 13.6 16.1 3.1
umc1425/umc2000 interval position 166.1 42.4
umc2000 166.9 38.7 26.6 12.3 14.5 2.3
umc2000/umc2158 midpoint 171.75 35.9 26.2 13.0 10.7 2.7
umc2158 176.6 27.8 23.3 13.1 5.5 2.8
umc2158/umc1495 midpoint 177 27.8 23.3 13.1 5.4 2.9
umc1495 177.4 26.8 23.3 13.1 5.2 2.6
umc1495/umc1392 midpoint 179.25 26.8 23.3 12.8 5.4 2.1
umc1392 181.1 24.0 23.1 12.4 5.2 1.3
NIL, near-isogenic line.
The 2-LOD (log of odds) interval in this population extends past the markers tested.
§Intermated B73 × Mo17.
RIL, recombinant inbred line.
#Marker positions that fall within the 2-LOD interval calculated for the population.
††Maximum LOD score for population.



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Matrix of Pearson correlation coefficients between entry effect estimates for scores from weeks 1 through 4 in the B73 near-isogenic line (NIL) F2:3 population.

 
Week 2 Week 3 Week 4
Week 1 0.94 0.92 0.92
Week 2 0.99 1.0
Week 3 1.0



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Matrix of Pearson correlation coefficients between entry effect estimates for scores from weeks 1 through 4 in the Stuber near-isogenic line (NIL) F2:3 population.

 
Week 2 Week 3 Week 4
Week 1 0.96 0.99 0.90
Week 2 1.0 0.94
Week 3 0.95



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Matrix of Pearson correlation coefficients between residuals for scores from weeks 1 through 4 in the B73 near-isogenic line (NIL) F2:3 population.

 
Week 2 Week 3 Week 4
Week 1 0.38 0.25 0.22
Week 2 0.57 0.57
Week 3 0.73



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Matrix of Pearson correlation coefficients between residuals for scores from weeks 1 through 4 in the Stuber near-isogenic line (NIL) F2:3 population.

 
Week 2 Week 3 Week 4
Week 1 0.74 0.51 0.49
Week 2 0.69 0.58
Week 3 0.73