Plant Breeding and Biotechnology

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Table. 4.

Table. 4.

Variance components and their interactions with locations and years; and heritabiity estimates for yield traits and disease scores obtained from 48 regional and local maize genotypes evaluated across greenbelt and ironstone plateau zones over three years (2013-2015) in South Sudan.

Variance component SD ASI PH FW MOIS TLB MSV GLS STB GY (t/ha)
σ2g 0.3** 0.2 9.0** 0.1** 1.3** 0.1** 0.1** 0.2** 0.2** 3.3**
σ2ge 1.6** 0.2 55.3** 0.1** 1.0* 0.2** 0.1* 0.1** 2.6** 17.0**
σ2gey 0.2 0.1* 53.7* 0.3* 4.9 0.3* 0.6 0.2 0.1* 20.9**
σ2ε 9.0 2.1 211.2 0.3 7.5 0.1 0.6 0.4 0.6 26.8
H2 86.3 78.1 82.5 64.8 71.4 80.2 76.9 83.8 80.4 77.3
h2 50.2 42.7 53.5 38.1 45.7 39.1 44.6 52.2 47.3 41.9
SEσ2g 0.02 0.01 0.21 0.12 1.02 0.01 0.05 1.04 0.03 0.03
SEH2 0.09 0.07 0.04 0.05 0.41 0.02 0.07 0.20 0.05 1.10
SEh2 0.02 0.02 0.01 0.03 0.21 0.01 0.01 1.03 0.01 0.07

*, **Significantly different at 0.05 and 0.01 probability levels; SD = silking date; ASI = anthesis-silking interval; PH = plant height (cm); MOIS = grain moisture content; TLB = Turcicum leaf blight; MSV = maize streak virus; GLS = gray leaf spot; STB = stem borer and GY = grain yield (t/ha); s2g = variance due to genotype effect; s2ge = variance due to genotype × location interactions; s2gey = variance due to genotype × location × year interactions; s2ε = variance due error effects; H2 = broad-sense heritability estimate; and h2 = narrow-sense heritability estimate.

Plant Breed. Biotech. 2021;9:124-38 https://doi.org/10.9787/PBB.2021.9.2.124
© 2021 Plant Breed. Biotech.