Duration days (d) and thermal time (°C d) of different pre-anthesis developmental phases of different groups of the F2:3 lines in the autumn-sown (AS) and spring-sown (SS) experiments.

Data are the duration days (d) with calculated thermal time (°C d) in parenthesis; SW: sowing date, DR: double ridge formation date, TS: terminal spikelet initiation date, AN: anthesis date. All data are means of each genotype. Statistical analysis was carried out using the thermal time. Data of the two parents were not considered in the statistical significance testing. Different letters within columns indicate statistically significant differences (P