Quantitative analysis of maize leaf collar appearance rates

文献类型： 外文期刊

第一作者： Xu, Honggen

作者： Xu, Honggen;Ming, Bo;Wang, Keru;Xue, Jun;Hou, Peng;Li, Shaokun;Xie, Ruizhi;Li, Shaokun;Xie, Ruizhi

作者机构：

关键词： Maize; Phenology; Phyllochron; Bilinear model; Sowing date; Genetic parameters

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：6.5； 五年影响因子：6.4 ）

ISSN： 0981-9428

年卷期： 2023 年 196 卷

页码：

收录情况： SCI

摘要： Phyllochron, the reciprocal of the leaf appearance rate, is a critical genetic parameter in crop models for pre-dicting growth characteristics and yield. Previous studies have shown that existing observations and predictive algorithms do not adequately represent a broad range of cultivars and environments. Here, we conducted a series of experiments in the field to quantify and disentangle the effects of sowing date and cultivar on maize leaf collar appearance (LCA). A bilinear model was found to accurately fit maize LCA (R2adj > 0.99); this model revealed a slower rate of LCA for the first leaves compared to the last leaves. Turning points in the model occurred between the 9.2th and the 13.1th leaf, nearly always below the ear leaf and around a leaf age index (LAI) of 60.0%. The phyllochron before the turning point (PHYLL I) was significantly higher than the phyllochron after the turning point (PHYLL II) for all three maize cultivars, and PHYLL I was approximately two times higher than PHYLL II on average. Both PHYLL I and PHYLL II were significantly affected by sowing date and cultivar. Variations in PHYLL I and PHYLL II indicated strong plasticity in maize phyllochron at different leaf ranks. The results of this study are critical for improvement of maize management practices and extend the applicability of phyllochron-collar measurements in crop models.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序