Table 2 The fertility-related traits of three parents and their F1 hybrids
Fertility-related traits (%)IngraCpslo17IR36Ingra/IR36Ingra/Cpslo17
In vitro pollen germination rate77.5 ± 2.177.8 ± 1.879.6 ± 0.177.5 ± 1.788.1 ± 1.1
Normal embryo sac95.1 ± 1.985.3 ± 2.481.4 ± 0.747.8 ± 5.150.8 ± 4.4
Fertilized ovaries89.4 ± 4.182.6 ± 1.692.4 ± 1.648.2 ± 2.555.6 ± 4.3
Open seed-setting rate95.7 ± 0.886.1 ± 6.286.6 ± 4.749.2 ± 2.259.6 ± 8.6
Supplementary pollination with parents44.3 ± 7.549.6 ± 4.1