Table 1.
Values of SI (%) calculated for physiological parameters characterizing drought response of the studied mapping populations (F3 lines) of malting and fodder barleys together with the values observed in parents
| Physiological parameter | Malting barley | Fodder barley | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Tolerant parent | Susceptible parent | F3 lines | Tolerant parent | Susceptible parent | F3 lines | |||||
| STH754 | STH836 | Min. | Max. | Mean | Suweren | MOB12055 | Min. | Max. | Mean | |
| WC | 101.0 | 99.4 | 91.5 | 100.9 | 96.6 | 99.6* | 96.8 | 93.9 | 101.1 | 97.4 |
| EL | 102.0* | 387.1 | 92.1 | 1171.2 | 446.2 | 130.4* | 280.8 | 142.4 | 1428.1 | 561.2 |
| A | 13.7* | 8.8 | 1.2 | 20.8 | 9.3 | 13.4 | 15.0 | 0.3 | 56.7 | 9.0 |
| F′v/F′m | 84.8* | 76.5 | 71.9 | 100.1 | 87.5 | 84.3 | 83.1 | 73.3 | 94.0 | 82.7 |
| q P | 79.8* | 66.9 | 50.8 | 96.8 | 80.0 | 83.4* | 80.3 | 59.3 | 111.4 | 83.2 |
| ΦPSII | 84.7* | 76.7 | 71.9 | 100.2 | 87.5 | 67.8 | 69.2 | 45.2 | 96.6 | 69.2 |
| ΦPSII/ΦCO2 | 660.2* | 742.0 | 469.2 | 7423.2 | 1664.4 | 500.1* | 938.6 | 155.7 | 35858.3 | 2637.0 |
| ABS/CS | 72.5* | 71.8 | 56.6 | 95.2 | 74.8 | – | – | – | – | – |
| TRo/CS | 67.4* | 65.5 | 53.8 | 100.0 | 71.5 | – | – | – | – | – |
| ETo/CS | 54.5* | 49.4 | 39.4 | 70.1 | 54.3 | – | – | – | – | – |
| DIo/CS | 89.9* | 92.6 | 63.9 | 98.6 | 85.1 | – | – | – | – | – |
| RC/CSm | 70.9* | 64.1 | 55.4 | 104.2 | 79.1 | – | – | – | – | – |
| PI | 33.4* | 25.9 | 17.6 | 72.1 | 38.1 | – | – | – | – | – |
SI values represent the % of the parameter value in drought relative to the value measured before drought. Please consider that in the case of EL, ΦPSII/ΦCO2 and DIo/CS higher values of the parameter means higher drought susceptibility, whereas in the remaining cases higher tolerance. The distribution of SI values in segregating population was always normal according to Shapiro–Wilk test (P = 0.05) with the exception of SI for ΦPSII/ΦCO2. SI values for tolerant parents indicated with the asterisk are significantly different than for susceptible one according to Mann–Whitney’s U test (the mean for genotype before drought was used for calculation of SI independently for each replication during drought) for P = 0.05