Table 4 Proportion (%) of total genotypic sum of squares of grain yield and other agronomic traits of early maturing inbred lines attributable to GCA-line, GCA-tester and SCA under drought, low soil N, optimal, Striga-infested and across the four management conditions.

From: Testcross performance and combining ability of early maturing maize inbreds under multiple-stress environments

Traits

GCA-line

GCA-tester

SCA

Grain yield

Drought

30

10

60

Low soil nitrogen

30

11

59

Striga infestation

34

10

56

Optimum

31

39

30

Across

31

30

39

Anthesis-silking interval

Drought

27

13

60

Low soil nitrogen

42

4

54

Striga infestation

34

12

54

Optimum

69

3

28

Across

14

2

84

Plant aspect

Drought

25

16

58

Low soil nitrogen

17

30

53

Optimum

29

46

25

Across

28

49

23

Ear aspect

Drought

28

14

58

Low soil nitrogen

20

18

63

Striga infestation

33

7

60

Optimum

24

42

34

Across

28

48

23

Ears per plant

Drought

24

3

73

Low soil nitrogen

30

12

58

Striga infestation

34

24

42

Optimum

26

3

70

Across

22

9

69

Stay-green characteristic

Drought

33

13

54

Low soil nitrogen

22

15

63

Across

46

22

32

Striga damage at 8 WAP

Striga infestation

39

16

45

Striga damage at 10 WAP

Striga infestation

41

11

48

Number of emerged Striga plants at 8 WAP

Striga infestation

15

19

65

Number of emerged Striga plants at 10 WAP

Striga infestation

23

20

56

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