2022-2023年在河南和海南以玉米自交系驻85、驻136、ZM3358为试验材料，研究自交系苞叶与穗轴同步发育特性。结果表明，河南苞叶驻85第1～7 d伸长迅速，速增期与ZM3358一致，低于驻136；穗轴，驻85第1～11 d急剧伸长。海南苞叶ZM3358伸长速增期为13 d，比驻85、驻136延长2～3 d；穗轴ZM3358伸长渐增期最长为19 d，显著高于驻85、驻136。河南苞叶驻85宽度持续变宽，驻136苞叶宽度第11 d开始增幅变缓，ZM3358苞叶宽度速增期最短为7 d；穗轴粗度驻136第1～17 d持续变粗，第19 d稍有下降。海南ZM3358苞叶宽度速增期为13 d，驻85、驻136苞叶宽度速增期均为9 d；驻85穗轴粗度速增期最长为19 d，苞叶与穗轴可保持同步发育特性。

Zhu85, Zhu136 and ZM3358 were conducted to study the synchronous development characteristics of husk and cob in 2022 and 2023.The results showed that the husk in Henan extended rapidly on the 1st-7th day of Zhu85, and the rapid growth period of husk was consistent with that of ZM3358, but lower than that of Zhu136, the cob of Zhu85 increased sharply on the 1st -11th day. In Hainan, ZM3358 husk elongation rapid increase period was 13 days, which was 2-3 days longer than that of Zhu85 and Zhu136, and ZM3358 cob elongation gradual increase period was 19 days, which was significantly higher than that of Zhu85 and Zhu136.The husk width of Zhu85 in Henan continued to widen, and the husk width of Zhu136 began to slow down on the 11th day, ZM3358 husk width rapid growth period is the shortest 7 days, the cob diameter of Zhu136 continued to thicken on the 1-17th day, and slightly decreased on the 19th day. The rapid growth period in husk width of ZM3358 in Hainan is 13 days, and the growth period in husk width of Zhu85 and Zhu136 is 9 days, and the maximum rapid growth period in cob diameter of Zhu85 is 19 days. The husk and cob could maintain synchronous development characteristics.

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河南省科技攻关计划项目(2024627)、河南现代玉米产业技术体系驻马店综合试验站建设项目(Z2022-02-04)