Table 2.
QTL for gray leaf spot (GLS) resistance and days to anthesis (DTA) identified in the CML444 X SC Malawi RIL population$
| Chr a | Bin b | Peak marker c | 1-LOD interval d | 2-LOD interval e | LOD Score f | R 2 g | Additive effect h | Allele source i | QTL name j |
|---|---|---|---|---|---|---|---|---|---|
| 1 |
1.10 |
umc147b |
264.7 - 281.0 |
264.3 - 285.7 |
3.39 |
10.1 |
-0.460 |
CML |
1C_GLS |
| 1 |
1.10 |
umc147b |
270.9 - 285.6 |
267.5 - 289.7 |
3.23 |
6.4 |
-0.278 |
CML |
1G_GLS |
| 3 |
3.02/3.03 |
bnlg1447 |
29.6 - 46.2 |
25.3 - 50.1 |
2.95 |
8.5 |
-0.409 |
CML |
3H_GLS |
| 3 |
3.09 |
bnlg1182 |
201.8 - 219.6 |
207.9 - 219.6 |
4.55 |
13.0 |
-0.472 |
CML |
3F_GLS |
| 4 |
4.01 |
umc1017 |
0.0 - 8.2 |
0.0 - 13.3 |
3.14 |
8.0 |
-0.252 |
CML |
4K_GLS |
| 4 |
4.08 |
umc15a |
121.9 - 133.8 |
116.5 - 136.6 |
4.78 |
10.9 |
-0.364 |
CML |
4G_GLS |
| 4 |
4.08 |
umc15a |
122.6 - 132.9 |
120.9 - 136.0 |
4.55 |
12.8 |
-0.551 |
CML |
4E_GLS |
| 4 |
4.08 |
umc15a |
122.9 - 136.1 |
120.4 - 140.5 |
3.59 |
8.9 |
-0.336 |
CML |
4B_GLS |
| 4 |
4.08 |
csu11b |
127.9 - 139.3 |
127.9 - 142.3 |
3.92 |
12.0 |
-0.497 |
CML |
4J_GLS |
| 6 |
6.06 |
umc1424 |
141.0 - 151.7 |
135.3 - 154.7 |
4.92 |
21.8 |
0.626 |
SC |
6F_GLS |
| 6 |
6.06/6.07 |
umc36 |
142.7 - 160.5 |
139.2 - 164.3 |
3.29 |
13.0 |
0.504 |
SC |
6H_GLS |
| 6 |
6.06/6.07 |
umc36 |
142.3 - 161.4 |
139.0 - 162.3 |
2.95 |
13.8 |
0.335 |
SC |
6K_GLS |
| 6 |
6.06/6.07 |
umc36 |
147.3 - 166.1 |
143.7 - 174.0 |
3.64 |
13.7 |
0.584 |
SC |
6E_GLS |
| 6 |
6.06/6.07 |
umc36 |
147.5 - 162.1 |
143.1 - 169.6 |
5.00 |
10.2 |
0.362 |
SC |
6G_GLS |
| 6 |
6.06/6.07 |
umc36 |
150.7 - 162.0 |
147.7 - 168.5 |
4.61 |
10.7 |
0.232 |
SC |
6I_GLS |
| 6 |
6.06/6.07 |
umc36 |
148.3 - 163.9 |
143.2 - 174.4 |
3.38 |
9.3 |
0.451 |
SC |
6J_GLS |
| 7 |
7.02 |
umc1393 |
10.0 - 28.7 |
9.0 - 30.7 |
3.16 |
10.2 |
0.467 |
SC |
7C_GLS |
| 7 |
7.02 |
umc1393 |
20.4 - 29.7 |
20.1 - 30.8 |
3.31 |
10.4 |
0.218 |
SC |
7I_GLS |
| 7 |
7.02/7.03 |
bnlg1808 |
22.1 - 36.5 |
20.4 - 40.5 |
3.00 |
9.0 |
0.273 |
SC |
7K_GLS |
| 7 |
7.02/7.03 |
bnlg1808 |
34.4 - 41.1 |
33.0 - 43.0 |
4.67 |
13.4 |
0.341 |
SC |
7A_GLS |
| 7 |
7.02/7.03 |
bnl15.21 |
30.8 - 42.8 |
30.8 - 44.6 |
3.16 |
9.4 |
0.446 |
SC |
7J_GLS |
| 7 |
7.04 |
bnl14.07 |
72.2 - 86.3 |
67.2 - 87.4 |
3.26 |
10.0 |
0.425 |
SC |
7F_GLS |
| 9 |
9.04/9.05 |
umc1231 |
83.0 - 97.3 |
75.6 - 97.6 |
3.31 |
10.7 |
-0.317 |
CML |
9A1_GLS |
| 9 |
9.04/9.05 |
umc1231 |
92.9 - 101.3 |
77.8 - 105.5 |
3.70 |
9.2 |
-0.435 |
CML |
9F1_GLS |
| 9 |
9.06 |
umc1733 |
115.0 - 122.8 |
110.7 - 124.5 |
3.40 |
7.6 |
0.398 |
SC |
9H_GLS |
| 9 |
9.06 |
umc1733 |
119.8 - 123.6 |
119.8 - 124.7 |
4.51 |
10.1 |
0.482 |
SC |
9F2_GLS |
| 9 |
9.06 |
umc1733 |
120.3 - 123.6 |
120.0 - 124.4 |
6.65 |
17.8 |
0.443 |
SC |
9A2_GLS |
| 10 |
10.2 |
umc1337 |
23.4 - 40.5 |
16.6 - 45.5 |
2.99 |
6.3 |
-0.283 |
CML |
10G1_GLS |
| 10 |
10.06/10.07 |
bnl7.49a |
114.0 - 127.9 |
110.9 - 129.8 |
4.53 |
13.5 |
-0.509 |
CML |
10H_GLS |
| 10 |
10.06/10.07 |
bnl7.49a |
113.4 - 129.2 |
108.7 - 129.9 |
4.52 |
12.5 |
-0.391 |
CML |
10G2_GLS |
| 4 |
4.08 |
umc15a |
122.3 - 134.4 |
120.4 - 138.0 |
3.90 |
10.6 |
-0.275 |
CML |
4_GLS* |
| 6 |
6.06/6.07 |
umc36 |
148.8 - 161.4 |
146.2 - 167.2 |
6.09 |
20.9 |
0.392 |
SC |
6_GLS* |
| 1 |
1.07 |
dupssr12 |
189.7 - 202.0 |
187.5 - 217.2 |
4.73 |
14 |
1.1399 |
SC |
1_DTA# |
| 4 | 4.09 | npi593a | 141.6 - 149.8 | 138.0 - 153.1 | 4.04 | 10 | 0.9455 | SC | 4_DTA# |
aMaize chromosome.
bChromosome bin location of QTL (1-LOD (i.e. 95% confidence) interval) based on shared markers with the IBM2005 neighbours frame map.
cPeak marker refers to marker on QMap 2.0 that is closest to the QTL peak.
dRange in cM that defines 1-LOD interval of QTL.
eRange in cM that defines 2-LOD interval of QTL.
fLog of odds (LOD) value at position of QTL peak.
gPhenotypic variance explained by the QTL (expressed as percentage).
hAdditive effect of QTL. For GLS disease ratings, this is based on the one to nine scale employed. For days to anthesis, this is based on days. Positive values indicate that the allele for resistance or early anthesis was derived from SC Malawi.
iParental allele associated with increased GLS resistance or earlier anthesis CML = CML444; SC = SC Malawi.
jQTL name. First number indicates maize chromosome number whereas letter denotes field trial as described in Figure 1. Subsequent numbers differentiate more than one QTL identified on the same chromosme in the same field trial. GLS represent QTL for GLS resistance whereas DTA indicate QTL for days to anthesis.
*Joint GLS QTL calculated from the mean z-scores of the least square means of the GLS disease scores from the eleven environments.
#DTA QTL were identified using DTA data from an independent field trial at Redgates 2010.
$GLS QTL were identified using QMap2.0 and GLS disease data from each of eleven environments in KwaZulu-Natal, South Africa. DTA QTL were identified using QMap2.0 and DTA data from an independent field trial at Redgates farm, KwaZulu-Natal, South Africa.