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Table 4 Estimates of genetic variance (±SE) and broad-sense heritability (±SE), of measured traits of testcrosses involving early-maturing yellow S1 families derived from four cycles of selection and tester TZEI 23, evaluated under artificial Striga infestation at Mokwa and Abuja in Nigeria, 2014

From: Yield gains and associated changes in an early yellow bi-parental maize population following genomic selection for Striga resistance and drought tolerance

Trait

Genetic variances

Broad-sense heritability

C0

C1

C2

C3

C0

C1

C2

C3

Grain yield (kg ha− 1)

71,631 ± 35488a

60,399 ± 56,601

80,359 ± 50,689

14,748 ± 41,440

0.43 ± 0.21a

0.24 ± 0.23

0.35 ± 0.22

0.08 ± 0.24

Days to anthesis

0.41 ± 0.27

0.10 ± 0.14

0.16 ± 0.14

0.59 ± 0.17b

0.33 ± 0.22

0.16 ± 0.23

0.27 ± 0.22

0.70 ± 0.20b

Days to silking

0.50 ± 0.32

0.13 ± 0.19

0.23 ± 0.16

0.72 ± 0.22b

0.34 ± 0.22

0.16 ± 0.23

0.32 ± 0.22

0.66 ± 0.20b

Anthesis-silking interval (days)

0.006 ± 0.012

0.010 ± 0.036

c

0.008 ± 0.014

0.12 ± 0.23

0.07 ± 0.24

c

0.12 ± .023

Plant height (cm)

34 ± 10b

13 ± 10

27 ± 10a

17 ± 6a

0.68 ± 0.20b

0.29 ± 0.22

0.54 ± 0.21a

0.56 ± 0.21a

Ear height (cm)

7.6 ± 2.98a

4.5 ± 4.62

4.2 ± 3.68

9.9 ± 3.13b

0.53 ± 0.21a

0.22 ± 0.23

0.26 ± 0.22

0.65 ± 0.20b

Root lodging (%)

0.028 ± 0.22

0.076 ± 0.13

c

0.167 ± 0.12

0.03 ± 0.24

0.14 ± 0.23

c

0.32 ± 0.22

Stalk lodging (%)

0.20 ± 0.19

0.44 ± 0.22a

0.20 ± 0.21

0.25 ± 0.18

0.24 ± 0.23

0.42 ± 0.21a

0.22 ± 0.23

0.30 ± 0.22

Husk cover d

0.009 ± 0.012

0

0.014 ± 0.013

c

0.16 ± 0.23

0

0.25 ± 0.22

c

Plant aspect e

0.003 ± 0.014

0.044 ± 0.025

c

0.021 ± 0.028

0.05 ± 0.24

0.38 ± 0.22

c

0.17 ± 0.23

Ear rot (%)

c

0.050 ± 0.071

0.073 ± 0.069

c

c

0.16 ± 0.23

0.24 ± 0.23

c

Ear aspect f

0.0012 ± 0.0015

c

0.0010 ± 0.0010

c

0.18 ± 0.23

c

0.22 ± 0.23

c

Striga damage (8 WAPg)

0.012 ± 0.014

0.044 ± 0.024

0.073 ± 0.026a

0.024 ± 0.024

0.19 ± 0.23

0.40 ± 0.22

0.58 ± 0.21a

0.23 ± 0.23

Striga damage (10 WAP)

0.004 ± 0.008

0.012 ± 0.014

0.017 ± 0.017

0.012 ± 0.017

0.13 ± 0.23

0.20 ± 0.23

0.23 ± 0.23

0.16 ± 0.23

Emerged Striga plants (8 WAP)

0.062 ± 0.029a

c

c

c

0.45 ± 0.21a

c

c

c

Emerged Striga plants (10 WAP)

0.057 ± 0.032

0.028 ± 0.034

c

0.008 ± 0.025

0.39 ± 0.22

0.19 ± 0.23

c

0.08 ± 0.24

  1. a, b = significantly different from zero at 0.05 and 0.01 levels of probability, respectively; c − negative variances treated as zero; dHusk cover scored on a scale of 1–9, where 1 = husks tightly arranged and extended beyond the ear tip and 9 = ear tips exposed.; ePlant aspect recorded on a scale of 1–9 based on plant type, where 1 = excellent and 9 = poor; fEar aspect rated on a scale of 1–9, where 1 = clean, uniform, large, and well-filled ears and 9 = ears with undesirable features; gWAP = weeks after planting
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BMC Plant Biology

ISSN: 1471-2229

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