Table 1.
F-ratio, percentage variance and significance levels for line, year, and line × year interaction, and heritability (h 2 in %) for 13 traits measured in doubled haploid lines of T. aestivum cultivated in optimal conditions for 4 years: F v/F m (the maximum photochemical efficiency), PI (overall performance index of PSII photochemistry), ABS/CSm (light energy absorption), TRo/CSm (amount of excitation energy trapped in PSII reaction centres), ETo/CSm (amount of energy used for electron transport), DIo/CSm (energy amount dissipated from PSII), RC/CSm (number of active reaction centres), Chla+b (total chlorophyll a + b), Car (carotenoids), SPAD (chlorophyll meter readings), GWE (grain weight per ear), YP (grain yield per plant), and DWP (dry weight per plant)
| F v/F m | PI | ABS/CSm | TRo/CSm | ETo/CSm | DIo/CSm | RC/CSm | Chla+b | SPAD§ | Car | GWE | YP | DWP | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Line | |||||||||||||
| F | 1.8** | 2.0** | 1.6* | 1.7* | 1.9** | 1.7* | 2.0** | 2.4** | 3.0** | 2.2** | 3.48** | 2.27** | 3.07** |
| % | 4.8 | 0.37 | 0.06 | 0.08 | 0.22 | 0.03 | 0.21 | 0.30 | 0.99 | 0.39 | 16.59 | 1.78 | 2.19 |
| Year | |||||||||||||
| F | 33.9** | 542.2** | 2953** | 2222** | 852.2** | 6065** | 928.0** | 791.6** | 300.6** | 559.8** | 15.3** | 121.1** | 132.6** |
| % | 90.1 | 99.0 | 99.8 | 99.8 | 99.3 | 99.9 | 99.2 | 99.0 | 97.9 | 98.9 | 72.8 | 95.3 | 94.6 |
| Line × year | |||||||||||||
| F | 1.9** | 3.6** | 3.3** | 3.2** | 4.5** | 2.4** | 5.1** | 5.2** | 3.6** | 4.0** | 2.2** | 3.7** | 4.5** |
| % | 5.1 | 0.67 | 0.11 | 0.14 | 0.52 | 0.04 | 0.55 | 0.65 | 1.16 | 0.71 | 10.59 | 2.89 | 3.2 |
| Error (%) | 1.39 | 0.05 | 0.01 | 0.01 | 0.03 | 0.01 | 0.02 | 0.02 | 0.09 | 0.04 | 2.22 | 0.22 | 0.16 |
| h 2 | 45.4 | 50.5 | 43.5 | 44.0 | 48.3 | 43.9 | 49.7 | 61.6 | 68.2 | 58.5 | 54.2 | 34.1 | 44.0 |
Significance levels * P ≤ 0.02; ** P ≤ 0.001, F Snedecor–Fisher coefficient
§Measured only in 2010 (EIII) and 2011 (EIV)