A Study on Genotype-by-Environment Interaction Analysis for Agronomic Traits of Maize Genotypes Across Huang-Huai-Hai Region in China |
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Authors: | Haiwang Yue Jianwei Wei Junliang Xie Shuping Chen Haicheng Peng Hongmei Cao Junzhou Bu Xuwen Jiang |
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Institution: | 1 Dryland Farming Institute, Hebei Academy of Agriculture and Forestry Sciences, Hebei Provincial Key Laboratory of Crops Drought Resistance Research, Hengshui, 053000, China2 Soil and Fertilizer Workstation of Hengshui Agriculture and Rural Bureau, Hengshui, 053000, China3 Maize Research Institute/College of Agronomy, Qingdao Agricultural University, Qingdao, 266109, China |
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Abstract: | Facing the trend of increasing population, how to increase maize grain yield is a very important issue to ensure
food security. In this study, 28 nationally approved maize hybrids were evaluated across 24 different climatic conditions for two consecutive years (2018–2019). The purpose of this study was to select high-yield with stable genotypes and identify important agronomic traits for maize breeding program improvement. The results of this
study showed that the genotype ╳ environment interaction effects of the 12 evaluated agronomic traits was highly
significant (P < 0.001). We introduced a novel multi-trait genotype-ideotype distance index (MGIDI) to select
genotypes based on multiple agronomic traits. The selection process exhibited by this method is unique and easy
to understand, so the MGIDI index will have more and more important applications in future multi-environment
trials (METs) research. The genotypes selected by the MGIDI index were G22, G10, G12 and G1 as the high yielding and stable genotypes. The parents of these selected genotypes have the ability to play a greater role as the basic
germplasm in the breeding process. A new form of genotype (G) main effects and genotype (G) -by-environment
(E) interaction (GGE) technician, genotype*yield*trait (GYT) biplot, based on multiple traits for genotypes selection was also applied in this study. The GYT biplot ranked genotypes by combining grain yield with other evaluated agronomic traits, and displayed the distribution of their traits, namely strengths and weaknesses. |
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Keywords: | GEI MGIDI GYT biplot AMMI model GGE |
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