Table 1 Phenotypic variation of the seven yield-related traits, including thousand grain weight (TGW), grain number per spike (GNS), grain width (GW), grain length (GL), plant height (PH), spike length (SL) and spikelet number per spike (SNS), for the parents and the CM42×CM39 RIL lines in different environments

TGW

2017SHF

54

52.94

38.34-70.88

58.57

5.84

9.98

0.54

2017SHL

50.64

41.83

20.81-68.14

43.76

9.17

20.95

2018SHF

54.79

53.47

40.44-72.7

54.67

5.58

10.2

2018SHL

53.06

51.29

37.89-67.33

54.51

5.57

10.22

2019SHF

52.4

42.42

32.59-66.54

51.27

5.94

11.59

2019SHL

51.05

47.38

23.4-62.74

46.9

6.22

13.27

BLUP

52.36

50.44

38.24-62.56

51.65

3.98

7.7

GW

2017SHF

3.68

3.42

3.19-4.21

3.82

0.16

4.28

0.49

2017SHL

3.54

3.31

2.6-4.01

3.38

0.29

8.57

2018SHF

3.58

3.53

3.19-4.04

3.69

0.16

4.35

2018SHL

3.63

3.61

3.15-3.96

3.65

0.15

4.14

2019SHF

3.6

3.16

3-3.9

3.5

0.18

5.21

2019SHL

3.56

3.49

2.84-3.99

3.49

0.19

5.37

BLUP

3.59

3.51

3.21-3.87

3.59

0.11

3.06

GL

2017SHF

7.73

7.17

6.78-8.81

7.76

0.41

5.26

0.6

2017SHL

6.95

6.53

5.94-7.89

6.86

0.37

5.39

2018SHF

6.87

6.72

5.89-7.92

6.95

0.37

5.3

2018SHL

7.64

6.55

5.88-7.81

6.85

0.37

5.45

2019SHF

7.32

6.43

6-7.71

6.86

0.33

4.84

2019SHL

7.22

6.67

6.03-7.71

6.94

0.36

5.15

BLUP

7.27

6.98

6.19-7.75

7.04

0.3

4.26

PH

2016SHF

90.34

89.5

66.5-120.3

91.53

9.5

10.38

0.91

2016SHL

89.8

87.2

76-148.3

95.97

10.49

10.93

2017SHF

97.67

96.33

81.33-143

103.3

10.65

10.31

2017SHL

99

98.8

66.63-121.2

91.39

9.73

10.65

2018SHF

91.7

87.08

65.08-131.9

93.9

11.82

12.59

2018SHL

94.61

90

70.8-135.4

95.57

11.32

11.84

2019SHF

90.05

85.9

69.45-126.8

98.74

9.89

10.02

2019SHL

93.33

89.3

78.5-127.4

97.58

8.98

9.21

BLUP

93.24

91.91

74.65-127.5

96

9.14

9.52

GNS

2017SHF

54

52

24-81.2

51.01

10.39

20.38

0.66

2017SHL

44.5

43.6

26-77

41.94

8.08

19.27

2018SHF

54.6

49.9

31.6-70.8

45.62

6.11

13.4

2018SHL

54.5

54.1

35.3-70.8

52.07

7.18

13.78

2019SHF

55.7

53.7

35.2-84.6

53.66

8.18

15.24

2019SHL

56.5

56.2

35.5-75.8

53.77

7.07

13.15

BLUP

53.17

52.44

37.76-66.18

49.85

4.62

9.26

SL

2016SHF

12.18

9.96

8.67-18

13.09

1.75

13.37

0.88

2016SHL

12.1

9

6.65-14

10.53

1.61

15.33

2017SHF

13.5

11.5

8.5-17.88

13.04

1.73

13.23

2017SHL

13

11.5

8.33-17.67

12.93

1.88

14.51

2018SHF

11.85

9.26

7.63-14.93

11.82

1.84

15.54

2018SHL

13.02

10.9

7.55-15.7

11.3

1.72

15.18

2019SHF

13.71

11.2

8.89-18.17

13.25

1.87

14.15

2019SHL

12.4

10.5

8.5-16.3

12.51

1.56

12.51

BLUP

12.71

11.6

8.45-15.69

12.31

1.5

12.22

SNS

2017SHF

18.6

19.6

16.2-25

19.58

1.39

7.08

0.4

2017SHL

21.2

21.2

18-27

21.4

1.63

7.63

2018SHF

21.9

21.5

17.7-24.5

21.66

1.13

5.2

2018SHL

20.9

20.7

17.9-25.2

21.02

1.22

5.81

2019SHF

21.7

21.2

17.9-25

21.29

1.2

5.63

2019SHL

17.2

18.1

15.83-21.2

18.35

1.04

5.67

BLUP

20.3

20.35

18.42-22.96

20.55

0.84

4.1