Genotype×environment interaction effect of waxy maize varieties in Huang-Huai-Hai Region

【Objective】To provide theoretical reference for wax maize breeding, genotype×environment interaction effect of tested varieties in Huang-Huai-Hai waxy maize regional trial were evaluated comprehensively.【Method】Additive main effects multiplicative interaction(AMMI) model and genotype main effect plus genotype-by-environment interaction biplot(GGE) model were used to analysis the related agronomic traits(fresh yield, ear length, fresh 100-kernel weight and seed rate) of 18 waxy maize varieties(g01-g18) at 13 test sites in the Huang-Huai-Hai waxy maize regional trial in 2018, to comprehensively evaluate the effect of genotype and environment interaction.【Result】Through AMMI model analysis, the results showed that Jinyuenuo 58(g06) and Jingpo 82(g07) had higher fresh ear yield and better stability, Suyunuo 2(g15, CK) showed poor but the most stable yield. The varieties with high seed rate and good stability were Sidanuo 44(g18) and Zhengbaitiannuo 3(g05), while Suyunuo 2(g15, CK) had medium seed rate but poor stability. The varieties with higher fresh 100-grain weight and better stability were Wannuo 2018(g04) and Jinyuenuo 58(g06), while the CK had medium fresh 100-grain weight but stable variety. The varieties with longer ear length and better stability were Jingpo 82(g07) and Huanuo 680(g11), while the CK belonged to the varieties with short ear length but good stability. There was extremely significant differences in genotypes, environment and the genotype×environment interaction of fresh ear yield, seed rate and ear length(P<0.01, the same below). Genotypes and environment of fresh 100-kernel weight traits reached extremely significant differences, but the genotype×environment interaction reached significant differences(P<0.05). The three principal components of the four agronomic traits explained the genotype×environment interaction effect(G+GE) were over 60.00%, indicating that the AMMI model explained the genotype×environment interaction effect well. Through the GGE diplot analysis, it was found that Wannuo 158(g03), Jinyuenuo 58(g06) and Jingpo 82(g07) were varieties with high fresh ear yield and stable yield. While Zhengbaitiannuo 1(g02) was the variety with long ears, high yield and good stability. Wannuo 2018(g04) was the variety with high fresh 100-grain weight and good stability, Zhongnuo 336(g16) was with high seed rate and stability.【Conclusion】AMMI model and GGE-biplot show different focuses and complementary advantages. Based on the analysis results of the two, the varieties with good comprehensive performance are Jingpo 82(g07) and Jinyue waxy 58(g06), which can be used for the breeding and promotion of highyield and stable-yield type waxy maize varieties.