Articles

Comparative performance and genotype by environment interaction effects on grain yield of single and multiple crosses of maize (Zea mays L.)


Abstract


A set of 256 entries involving seven parents and their single, three-way and double crosses derived through half diallel were evaluated along with private/public hybrids for grain yield in a balanced lattice design at three environments during kharif 2015. ANOVA revealed that TWC × Parents, DC × TWC, DC × SC, DC × Parents, SC × Parents interaction were significant at all the locations. Mean squares for singles, double and three-way crosses were similar at Hyderabad, Karimnagar locations and at Palem location with high mean squares for three-way crosses. Data were also obtained on the variety × environment interaction patterns for the three types of crosses. Significant interaction deviate was higher for double crosses followed by three-way crosses and single crosses.Average yield of double crosses was 37 kg ha-1 greater than that for single crosses, and the average for single crosses was 143 kg ha-1 greater than for three-way crosses. The range of single crosses was 483 kg ha-1 less than that for three-way crosses and 30 kg ha-1 greater than that for double crosses. Stability analysis for grain yield showed significant genotype × environment interaction in all the three classes of hybrids and the crosses (BML-51 × BML-10) × (BML-6), (BML-51 × BML-32) × (BML-13 × BML-6) and (BML-13 × BML-7) × (BML-10 × BML-6) were found to be stable, had average response to all environments, hence these are need to be exploited to combat biotic and abiotic stresses arising through climate change.

Keywords

Maize, hybrids, interaction deviate, genotype environment interaction, grain yield

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