Male Parent Plays More Important Role in Heat Tolerance in Three-Line Hybrid …

Ten F1 combinations with their male and female parents were employed to evaluate their heat tolerance during the flowering and early grain filling stages. The rice plants were subjected to heat stress (39 °C–43 °C) for 1–15 d during flowering. Based on the heat stress index, heat tolerance was only observed in the F1 combinations H2 (K22A × R207), H3 (Bobai A × R207) and H4 (Bobai A × …