The purpose of this study was to examine the genotypic variation in maize doubled haploid (DH) lines response to brassinosteroid and gibberellin inhibitors. Plant responses to hormone inhibitors were determined in growth chamber experiments using germination paper for three different seedling treatments: application of propiconazole (Pcz), uniconazole (Ucz) or water (control). Mesocotyl length (ML) was more sensitive to hormone inhibitors, especially to the Ucz treatment, than other seedling traits. ML was significantly correlated with other traits in the Ucz treatment. All the seedling traits showed moderate‐to‐high broad sense heritability values, ranging from 0.39 to 0.82. The Euclidian genetic distances of inbred line pairs ranged from 1.27 to 19.94, indicating there was a high level of variability across the maize DH lines used in this study. DH lines with extreme MLs were identified, which can provide valuable breeding resources for improving abiotic stress tolerance, and for further genetic studies.

中文翻译：

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玉米（Zea mays）双倍单倍体系中油菜素和赤霉素抑制剂对幼苗性状的遗传变异

这项研究的目的是检查玉米对油菜素甾醇和赤霉素抑制剂的双倍单倍体（DH）系的基因型变异。在生长室实验中，使用发芽纸针对三种不同的幼苗处理方法确定了植物对激素抑制剂的反应：施用丙环唑（Pcz），烯效唑（Ucz）或水（对照）。中胚轴长度（ML）比其他幼苗性状对激素抑制剂（特别是对Ucz处理）更敏感。在Ucz治疗中，ML与其他特征显着相关。所有幼苗性状均表现出中度至高度的广义遗传力值，范围从0.39至0.82。自交系对的欧几里得遗传距离范围为1.27至19.94，这表明本研究中使用的玉米DH系之间存在很高的变异性。