TABLE 6

Digenic epistatic QTL affecting F1 hybrid performance and heterosis (HMP) of panicles/plant (PP) detected in the Lemont (LT)/Teqing (TQ) BCF1 (RILs × LT and TQ) and two testcross F1 (RILs × Z413 and IR64) populations

QTLi Marker intervalQTLj Marker intervalF1HMP
Pop.ChromosomeChromosomeLODaIajaaijR2 (%)LODaiajaaijR2 (%)
LT1RZ14–C944b3C746–CDO3374.09−0.6411.1
LT1RG140–RZ2889G103b–RZ6984.330.51**0.38*−0.51**7.85.68−1.00***17.3
LT2RG256–RZ260a2G45–RZ386a2.780.53**8.15.780.83***12.1
LT2RZ260a–RZ2739RZ698–G953.730.34*0.58***9.15.710.91***14.5
LT5RG556–gl110C16–RG5613.25−0.62**10.22.31−0.66***7.6
LT6RZ762–C766G294a–G1468b5.730.34*0.86***12.7
LT8G56a–R662a10RZ400–RG241a2.82−0.52**8.05.34−0.88***13.5
LT9G103b–RZ69811RZ900–G446.060.44**0.64***10.93.060.44**0.42*6.4
TQ3RG341b–C74a6RG653–RZ5084.11−0.88***14.94.58−0.95***13.1
TQ3CDO795a–RZ4746RZ762–C762.52−0.60***6.8
TQ4RG449–RZ696G1314b–HHU374.460.85***13.93.670.87***10.8
TQ4RZ69–RG1906C–G200a2.57−0.46**5.25.68−0.81***9.4
TQ9RG570a–RG45112RG869–L1023.710.95***13.1
Z4131RZ288–C13112RZ397–RZ2574.570.81***8.63.840.40*0.77***9.4
Z4132RG256–RZ260a4G379–RZ7402.540.62**5.03.850.80***10.3
Z4134HHU39–RG1438C1073a–G1873.98−0.75***7.43.4−0.79***10.0
Z4136C236–RG65312RG91q–RG341a3.691.07***−0.66**−0.87***9.8
Z4138C1073a–G1879RZ777–CDO822.72−0.76***7.6
IR641C112–RG2364Ph–G3793.44−0.78***6.33.55−0.74***5.5
IR641CDO118–CDO4553C74a–RG4505.37−1.04***11.32.42−0.71***5.1
IR642RZ273–RG1398G104–G1314a4.941.01***10.64.390.45*0.83***7.1
IR643RG104–C51510G1084–RZ4004.500.83***7.24.050.83***6.9
IR644HHU39–RG1435RG556–gl14.840.95***9.3
IR641RZ801–RZ142RG520–RZ446b3.75−0.83***7.0
IR644RG449–RZ6911L457b–G2132b4.161.02***10.5
  • ai and aj are the main effects of the loci i and j, estimated by the difference between heterozygote, the homozygote in the BCF1 populations (LT and TQ), and by the differences between the two heterozygotes (tester/Teqing − tester/Lemont) in the testcross populations (Z413 and IR64) using the F1 mean and HMP measurements; aaij is the epistatic effect between loci i and j, as defined by Mather and Jinks (1982). * Significance levels of P < 0.05. ** Significance levels of P < 0.001. *** Significance levels of P < 0.0001.