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Table 6 Mean values for chlorophyll index (SPAD units), thylakoid membrane damage (Fo/Fm ratio; unitless) and quantum yield of PSII (ΦPSII; unitless) of six highest (top) and six lowest (bottom) ranked wheat–alien chromosome lines along with CS check under irrigation (control) and drought stress (water withheld for 16 d) (Experiment 3)

From: Alien chromosome segment from Aegilops speltoides and Dasypyrum villosum increases drought tolerance in wheat via profuse and deep root system

Rank Chlorophyll index (SPAD units) Thylakoid membrane damage (Fo/Fm ratio; unitless) Quantum yield of PSII (ΦPSII; unitless)
Line Irrigated Drought Line Irrigated Drought Line Irrigated Drought
Top 6          
  TA7598 54.25 ± 0.65 49.30 ± 0.80 TA5608 0.200 ± 0.012 0.425 ± 0.012 TA7656 0.58 ± 0.02 0.47 ± 0.03
TA7600 40.30 ± 1.20 43.15 ± 1.45 TA7659 0.195 ± 0.011 0.420 ± 0.021 TA7619 0.53 ± 0.01 0.45 ± 0.02
TA7543 42.10 ± 0.50 38.25 ± 0.15 TA5599 0.215 ± 0.011 0.415 ± 0.011 TA7543 0.49 ± 0.01 0.43 ± 0.02
TA7655 42.30 ± 0.40 38.15 ± 0.45 TA5600 0.185 ± 0.012 0.405 ± 0.012 TA5088 0.59 ± 0.01 0.40 ± 0.01
TA5638 47.15 ± 1.65 38.10 ± 0.55 TA5584 0.195 ± 0.013 0.405 ± 0.011 TA5638 0.51 ± 0.01 0.39 ± 0.01
TA5088 46.15 ± 0.35 36.90 ± 1.30 TA3583 0.225 ± 0.011 0.400 ± 0.011 TA7545 0.47 ± 0.01 0.37 ± 0.01
Bottom 6          
  TA5637 43.60 ± 1.30 23.80 ± 0.45 TA7599 0.190 ± 0.010 0.260 ± 0.012 TA7544 0.53 ± 0.01 0.13 ± 0.01
  TA3583 47.85 ± 1.76 21.45 ± 1.15 TA5088 0.195 ± 0.012 0.255 ± 0.016 TA7667 0.37 ± 0.01 0.13 ± 0.01
TA7657 34.85 ± 0.75 20.85 ± 0.75 TA5617 0.220 ± 0.015 0.255 ± 0.013 TA6656 0.43 ± 0.01 0.12 ± 0.01
TA5640 30.00 ± 0.45 20.75 ± 0.35 TA5638 0.155 ± 0.016 0.255 ± 0.012 TA3583 0.46 ± 0.01 0.11 ± 0.01
TA7664 34.50 ± 1.10 19.95 ± 0.36 TA7619 0.210 ± 0.012 0.255 ± 0.012 TA5584 0.52 ± 0.01 0.11 ± 0.01
TA5584 39.35 ± 0.45 19.60 ± 1.02 TA7656 0.195 ± 0.015 0.255 ± 0.011 TA5636 0.47 ± 0.01 0.11 ± 0.01
Check (CS)          
  TA3008 32.3 ± 1.10 21.05 ± 0.45 TA3008 0.220 ± 0.011 0.355 ± 0.011 TA3008 0.47 ± 0.03 0.32 ± 0.01
LSD (Genotype)    1.89    0.017    0.020
LSD (Genotype x Stress)    1.86    0.003    0.005
  1. Genotypes were ranked based on numerical values under drought stress. Values are means ± standard error of the respective trait. CS Chinese Spring, LSD least significant difference