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Table 1 Grain yield and other agronomic traits of 20 early provitamin A- quality protein maize hybrids (best 15 and worst 5) and four checks evaluated under low-N and optimal environments in 2016 and 2017 growing seasons at Ile-Ife and Mokwa, Nigeria

From: Genetic diversity among early provitamin A quality protein maize inbred lines and the performance of derived hybrids under contrasting nitrogen environments

HYBRID

Grain Yield (kg/ha)

% YRD

Days to 50% Silking

Plant Aspect

Ear Aspect

Ears per plant

STGR

MI_LN

Low-N

Optimal

Across Env

Low-N

Optimal

Low-N

Optimal

Low-N

Optimal

Low-N

Optimal

TZEIORQ 40 x TZEIORQ 26

4155

5911

5207

29

52

51

4

3

4

2

0.92

0.95

2

6.18

TZEIORQ 42 x TZEIORQ 20

4584

5905

5245

22

52

52

4

3

3

3

0.83

0.93

3

5.76

TZEIORQ 43 x TZEIORQ 5

4359

6101

5230

29

51

50

5

4

4

3

0.91

0.96

2

5.44

TZEIORQ 47 x TZEIORQ 15

4004

5663

4833

29

52

51

4

3

4

3

0.96

0.98

3

5.29

TZEIORQ 29 x TZEIORQ 43

5055

5639

5458

10

54

53

5

4

4

3

0.76

0.96

2

5.11

TZEIORQ 23 x TZEIORQ 11

4623

5729

5392

19

53

51

4

3

4

3

0.79

0.92

3

4.70

TZEIORQ 26 x TZEIORQ 47

4160

5857

5109

29

52

52

4

3

4

3

0.85

0.85

3

4.59

TZEIORQ 40 x TZEIORQ 2

4556

6082

5319

25

53

51

4

3

4

3

0.91

0.97

4

4.58

TZEIORQ 7 x TZEIORQ 42

4016

5655

4886

29

52

51

5

4

4

3

0.97

0.97

3

4.46

TZEIORQ 26 x TZEIORQ 13

4384

6198

5341

29

53

52

4

3

4

3

0.92

0.95

4

4.43

TZEIORQ 70 x TZEIORQ 2

4369

6016

5592

27

54

54

5

4

4

3

0.91

0.99

3

4.43

TZEIORQ 42 x TZEIORQ 11

4432

5530

4981

20

52

51

5

4

4

3

0.8

0.96

3

3.61

TZEIORQ 43 x TZEIORQ 26

4030

5620

4925

28

52

50

5

4

4

2

0.86

0.87

3

3.58

TZEIORQ 48 x TZEIORQ 43

4694

5888

5291

20

53

52

5

4

4

3

0.75

0.97

3

3.54

TZEIORQ 43 x TZEIORQ 2

4440

6074

5507

27

52

51

5

4

4

3

0.91

0.98

4

3.50

TZEIORQ 7 x TZEIORQ 23

1444

2537

1990

43

57

54

7

6

7

5

0.59

0.66

5

−8.24

TZEIORQ 41 x TZEIORQ 47

933

2934

1933

68

54

53

7

6

7

5

0.67

0.85

5

−10.38

TZEIORQ 23 x TZEIORQ 20

935

2495

1715

63

56

55

7

6

7

5

0.64

0.66

5

−10.63

TZEIORQ 40 x TZEIORQ 41

932

2401

1657

61

55

54

7

6

7

6

0.55

0.71

5

−11.37

TZEIORQ 43 x TZEIORQ 41

747

2568

1657

71

57

55

7

6

7

5

0.62

0.71

5

−13.17

C1-TZEIOR 127 x TZEIOR 57

3805

5712

4758

33

53

51

5

4

4

3

0.92

0.92

3

3.78

C2-TZEI 124 x TZEI 25

3690

6074

4882

39

55

53

4

3

4

3

0.78

0.88

3

3.41

C3-TZE Pop DT STR x TZEI 17

2962

5500

4231

46

54

52

5

4

5

4

0.77

0.83

3

0.67

C4-TZE Pop DT STR x TZEI 13

2430

4381

3406

45

56

54

5

4

5

4

0.7

0.73

4

−1.62

MEAN

3542.60

5040.15

4363.44

34.03

53.30

52.06

5.15

4.15

4.70

3.45

0.81

0.89

3.50

 

SED

533.27

585.01

395.80

0.67

0.64

0.39

0.37

0.46

0.48

0.08

0.09

0.41

 

REPEATABILITY (R)

0.75

0.82

0.80

0.81

0.85

0.78

0.86

0.81

0.88

0.47

0.55

0.72

 
  1. Across Env across low-N and optimal environments, %YRD percentage yield reduction, PASP plant aspect (1–9), EASP ear aspect (1–9), EPP ears per plant, STGR stay green characteristic, MI_LN multiple trait base index under low-N, C1 to C4 checks 1 to 4 respectively