Table 1 Estimates of the best fit model for generation means parameters (± , standard error) by weighted least squares analysis for measured traits in IUB-13 × FH-115 (Cross 1) and GH-Mubarak × NIAB-Kiran (Cross 2) cotton grown under normal (N) and heat stress (H) conditions

SCY

N1

117 ± 0.47

–

–

31.66 ± 0.79

–

–

4.34 (4)

H1

107.1 ± 0.34

2.52 ± 0.52

–

–

–

–

5.39 (4)

N2

135.3 ± 1.74

–

16.48 ± 2.25

16.0 ± 1.87

9.79 ± 2.35

–

1.43 (2)

H2

70.98 ± 0.81

29.87 ± 1.02

–

–

–

–

4.83 (4)

GOT

N1

36.56 ± 0.06

1.54 ± 0.12

–

–

–

–

3.68 (4)

H1

34.79 ± 0.10

2.22 ± 0.17

–

–

–

–

2.99 (4)

N2

36.32 ± 0.04

0.82 ± 0.09

–

–

–

–

5.39 (4)

H2

34.81 ± 0.15

1.96 ± 0.22

–

–

–

–

4.13 (4)

Pol Via

N1

67.41 ± 0.21

5.88 ± 0.34

–

–

–

–

3.84 (4)

H1

49.62 ± 0.21

8.45 ± 0.34

–

–

–

–

3.50 (4)

N2

65.90 ± 0.23

10.67 ± 0.32

–

–

–

–

4.82 (4)

H2

52.11 ± 0.37

9.92 ± 0.34

17.11 ± 1.75

–

–

15.7 ± 1.72

1.57 (2)

CMT

N1

55.85 ± 0.19

5.98 ± 0.32

–

–

–

–

2.41 (4)

H1

44.85 ± 0.28

–

–

1.312 ± 0.49

–

–

4.07 (4)

N2

56.13 ± 0.22

4.71 ± 0.38

–

–

–

–

2.90 (4)

H2

45.10 ± 0.17

4.97 ± 0.28

–

–

–

–

4.24 (4)

H₂O₂

N1

0.58 ± 0.002

0.32 ± 0.003

–

–

–

–

5.16 (4)

H1

0.41 ± 0.01

0.52 ± 0.003

0.44 ± 0.01

0.48 ± 0.01

–

–

4.92 (2)

N2

0.36 ± 0.01

0.41 ± 0.003

0.28 ± 0.01

0.33 ± 0.01

–

–

2.82 (2)

H2

0.29 ± 0.01

0.51 ± 0.002

0.50 ± 0.03

0.60 ± 0.01

–

–

2.54 (2)

POD

N1

11.12 ± 0.11

2.27 ± 0.15

–

–

–

–

2.14 (4)

H1

17.66 ± 0.18

4.50 ± 0.28

–

–

–

–

2.10 (4)

N2

12.48 ± 0.14

1.99 ± 0.22

–

–

–

–

2.45 (4)

H2

19.65 ± 0.21

5.33 ± 0.30

–

–

–

–

3.34 (4)

PRO

N1

0.58 ± 0.07

0.21 ± 0.10

–

–

–

–

2.50 (4)

H1

0.76 ± 0.02

0.33 ± 0.03

–

–

–

–

5.47 (4)

N2

0.58 ± 0.20

0.16 ± 0.29

–

–

–

–

0.15 (4)

H2

0.86 ± 0.22

0.34 ± 0.33

–

–

–

–

0.96 (4)