TABLE 4

Features of QTL for grain yield, heading date, and plant height on a single-environment basis

Lbn-i05aSyr-i04Itl-r04Syr-i05Itl-r05Syr-r05Syr-r04Spn1-r04Mrc-i05Tns-i04Lbn-r05Lbn-i04Tns-r04Lbn-r04Spn2-r05Mrc-r05
58.8b57.457.356.854.043.141.834.830.929.628.126.517.616.715.35.6
a. Grain yield
Total QTL no.2333303312003120
QYld.idw-2B
    LOD (CIM)4.16.33.23.53.27.56.9(2.6)
    R2 (MIM)9.912.48.77.25.311.311.73.5
    ac (MIM)0.521.701.280.720.391.550.380.48
    a (%)d0.82.92.31.30.94.41.32.7
QYld.idw-3B
    LOD3.17.59.63.43.5(2.5)3.3
    R24.812.318.15.47.55.17.5
    a−0.35−1.62−1.73−0.35−1.24−0.24−0.13
    a (%)5.92.83.00.93.60.80.9
QYld.idw-2B × QYld.idw-3B
    R26.616.77.62.45.7
    a × ae0.431.911.220.780.28
    a × a (%)7.33.32.12..21.0
Multiple R2 (MIM)21.331.144.737.917.014.826.26.522.511.74.713.7
b. Heading date
Total QTL no.3242345443463344
QHd.idw-1B
    LOD (CIM)4.73.3
    R2 (MIM)5.44.1
    ac (MIM)0.40.3
QHd.idw-2A.1
    LOD13.88.7
    R235.321.9
    a2.71.4
QHd.idw-2A.2
    LOD10.911.518.79.515.56.119.215.28.6(2.8)17.53.213.8
    R218.117.834.714.724.210.028.422.812.53.722.45.317.4
    a0.70.81.30.71.10.51.01.10.60.31.10.30.6
QHd.idw-2B.1
    LOD3.74.13.3
    R23.24.75.1
    a−0.5−0.4−0.3
QHd.idw-2B.2
    LOD8.55.54.23.57.56.93.65.57.33.45.56.27.53.1
    R212.38.77.06.311.38.76.38.213.01.85.512.810.24.2
    a0.50.60.50.50.50.60.61.20.60.20.60.50.50.6
QHd.idw-2B.3
    LOD7.74.23.2
    R215.26.54.1
    a−0.6−0.4−0.3
QHd.idw-3B
    LOD7.34.3
    R213.39.3
    a0.50.4
QHd.idw-7B
    LOD4.65.38.55.15.05.06.94.45.47.511.07.8
    R213.918.616.711.413.712.514.36.514.216.524.312.8
    a−0.6−0.9−0.7−0.7−0.6−0.7−0.9−1.1−0.6−0.9−0.7−1.1
QHd.idw-2A.2 × QHd.idw-7B
    R24.52.7
    a × ae0.50.4
QHd.idw-2B.3 × QHd.idw-3B
    R212.811.5
    a × a0.50.5
QHd.idw-2A.2 × QHd.idw-3B
    R22.1
    a × a0.3
Multiple R2 (MIM)44.426.564.941.335.347.245.855.047.150.044.446.047.122.256.141.6
c. Plant height
Total QTL no.6046434706033411
QPht.idw-1B.1
    LOD (CIM)3.87.18.15.54.05.83.4
    R2 (MIM)4.79.912.011.35.97.86.3
    ac (MIM)0.92.32.32.71.41.40.3
QPht.idw-1B.2
    LOD3.5(2.8)(2.5)
    R25.85.74.1
    a1.11.70.9
QPht.idw-2B
    LOD3.75.75.2(2.7)3.36.24.58.4(2.5)
    R210.712.88.77.56.212.06.914.84.4
    a1.52.12.11.31.71.91.12.40.4
QPht.idw-3A
    LOD4.84.53.03.03.23.03.85.54.74.8
    R27.35.63.53.93.23.84.56.27.010.6
    a−1.3−1.2−1.7−1.4−0.8−1.3−1.3−0.9−0.4−0.4
QPht.idw-3B
    LOD4.94.211.66.9(2.5)4.36.55.74.59.34.5
    R27.311.214.110.94.37.010.17.98.516.54.9
    a−1.2−1.8−2.8−2.2−1.7−1.2−2.1−1.5−1.2−2.4−0.3
QPht.idw-4B
    LOD2.8(2.8)
    R24.12.7
    a0.91.1
QPht.idw-7A
    LOD3.15.93.13.1(2.6)3.4
    R23.710.35.77.16.14.9
    a0.82.41.72.11.61.1
QPht.idw-2B × QPht.idw-3B
    R24.815.25.46.53.19.67.18.2
    a × ae1.02.31.91.21.31.81.11.8
QPht.idw-2B × QPht.idw-7A
    R24.72.1
    a × a1.01.2
QPht.idw-3B × QPht.idw-7A
    R21.41.7
    a × a1.21.1
Multiple R2 (MIM)47.450.660.034.222.726.841.650.828.644.222.210.66.3
  • Main features of the QTL for grain yield, heading date, and plant height detected in the 16 environments are listed in decreasing order according to the mean RIL grain yield values. The total number of QTL found in each environment (CIM, LOD > 2.5) and the corresponding multiple R2 obtained in the MIM model are reported. For each QTL with significant effect in at least two environments (QTL peaks located within 20 cM) the corresponding LOD value (from CIM analysis) is reported. The R2 and the additive and epistatic effects (as from the MIM analysis) are also reported. The LOD values of QTL with LOD peaks between 2.5 and 2.9 are included in parentheses.

  • a Environments listed according to the decreasing mean yield value of the RILs.

  • b Mean grain yield data (q ha−1) of each environment.

  • c Additive effect for grain yield (q ha−1), heading date (days), and plant height (cm) computed as half of the difference between the mean phenotypic values of the RILs homozygous for the Svevo and Kofa alleles [(Svevo − Kofa)/2] in the multiple-interval mapping analysis.

  • d Additive effect expressed as percentage of the mean grain yield of the RILs in the specific environment.

  • e Additive-by-additive epistatic effect as computed in the multiple-interval-mapping analysis.