TABLE 2

Summary statistics on inbreeding depression of the Lemont/Teqing RILs and the midparental heterosis (HMP) of two backcross F1 (RILs × parents) and two testcross F1 populations (RILs × two testers, Z413 and IR64)

Panicles per plant (PP)Grains per panicle (GP)1000-grain weight (GW, g)
MeanSDRangeMeanSDRangeMeanSDRange
Zhejiang Agricultural University
Lemont (LT)6.01.159.73.222.51.3
Teqing (TQ)8.31.2109.23.626.01.7
F1 (LT × TQ)9.71.5157.64.024.92.0
HMP2.673.20.7
CK (SY63)12.52.783.12.631.01.6
LTBCF18.72.04.0 ~ 15.5107.849.634.4 ~ 276.426.03.020.1 ~ 34.2
(LTBC) HMP2.62.5−5.3 ~ 9.842.550.4−44.2 ~ 191.52.73.1−8.6 ~ 9.2
TQBCF19.62.15.3 ~ 14.5129.238.048.9 ~ 283.725.42.917.9 ~ 34.6
(TQBC) HMP2.32.4−5.7 ~ 8.239.240.5−42.5 ~ 199.00.42.9−6.9 ~ 8.4
RILs6.32.52.3 ~ 20.070.929.821.4 ~ 169.524.24.015.0 ~ 34.4
HBa−0.92.5−6.8 ~ 11.8−13.529.8−63.1 ~ 85.1−0.14.0−12.5 ~ 6.8
China National Rice Research Institute
Lemont (LT)9.12.059.56.721.31.6
Teqing (TQ)12.51.9166.420.225.51.6
F1 (LT × TQ)11.82.6201.915.224.80.7
HMP1.089.01.4
CK (SY63)18.61.9126.221.526.11.2
Z41312.21.2179.016.425.61.5
IR6413.61.883.514.923.70.5
Z413F113.82.67.3 ~ 25.0142.537.452.1 ~ 233.124.52.49.9 ~ 31.3
(Z413F1) HMP2.72.7−3.5 ~ 11.310.138.9−104.6 ~ 106.80.92.2−12.3 ~ 7.7
IR64F115.92.99.2 ~ 27.5134.027.964.4 ~ 234.224.82.213.0 ~ 30.9
(IR64F1) HMP4.13.0−3.3 ~ 16.049.429.5−21.4 ~ 155.42.12.2−9.8 ~ 8.3
RILs10.02.55.3 ~ 16.785.827.518.9 ~ 181.021.62.714.7 ~ 31.1
HB−0.82.5−5.5 − 5.9−27.227.5−84.6 − 77.6−1.82.68−10.7 ~ 7.7
  • a HB = RIL − MP, where HB is hybrid breakdown and MP = (Lemont + Teqing)/2.