Table 1

Characteristics of EP39 and EP42, EP42 × EP39 and the RIL population developed from EP42 × EP39.

Means

Variances


EP39

EP42

F1

RILs


Stalk tunnel length (cm)

19.9 ± 5.5

54.9 ± 5.5

43.4 ± 4.0

38.9 ± 4.0

39.3 ± 8.0**

11.8 ± 6.6

101.6 ± 6.3**


Relative stalk tunnel length

0.38 ± 0.11

0.51 ± 0.11

0.32 ± 0.03

0.42 ± 0.07

0.0016 ± 0.0006**

0.0013 ± 0.0007

0.01125 ± 0.0007**


Kernel damage (1-9 scale)a

6.67 ± 0.58

6.82 ± 0.59

8.43 ± 0.16

7.38 ± 0.12

0.098 ± 0.0557

0.080 ± 0.070

1.148 ± 0.073**


Shank damage (1-9 scale)a

3.09 ± 0.37

3.90 ± 0.37

5.97 ± 0.69

4.05 ± 0.43

0.55 ± 0.17**

0.00 ± 0.00

2.68 ± 0.20**


Cob damage (1-9 scale)a

5.33 ± 0.35

7.37 ± 0.35

8.50 ± 0.10

7.53 ± 0.21

0.632 ± 0.123**

0.041 ± 0.003**

1.217 ± 0.093**


Anthesis (days)

64.6 ± 7.4

66.3 ± 7.4

59.2 ± 6.1

66.8 ± 7.2

7.88 ± 1.02**

1.23 ± 0.35**

4.23 ± 0.26**


Silking (days)

67.3 ± 6.5

67.6 ± 6.5

61.3 ± 5.7

68.8 ± 6.3

9.05 ± 1.25**

2.31 ± 0.52**

5.26 ± 0.32**


Plant height (cm)

56.4 ± 4.0

109.7 ± 4.0

132.5 ± 7.8

93.7 ± 4.2

121.2 ± 18.0**

26.5 ± 9.6**

126.8 ± 7.9**


Grain humidity (%)

18.9 ± 0.7

15.5 ± 0.7

19.4 ± 0.3

17.8 ± 0.3

0.82 ± 0.33**

1.59 ± 0.35**

3.46 ± 0.21**


Yield (t ha-1)

0.93 ± 0.25

2.51 ± 0.25

6.67 ± 0.96

1.80 ± 0.24

0.37 ± 0.08**

0.26 ± 0.06**

0.64 ± 0.04**


Estimates of means ± standard deviation, as well as of variance components were obtained for several agronomic and resistance traits after evaluation in two environments under artificial infestation with corn borer eggs

a Kernel, Shank and cob damages were estimated on a 9 point scale (9 = without injury; 1 = wholly damaged)

** Variance component was significant at the 0.01 probability level

Ordas et al. BMC Genomics 2010 11:174   doi:10.1186/1471-2164-11-174

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