文献类型： 外文期刊

作者： Xiong, Cai-Yun ¹ ; Gong, Qing-You ² ; Pei, Hu ³ ; Liao, Chang-Jian ⁴ ; Yang, Rui-Chun ¹ ; Li, Gao-Ke ⁵ ; Huang, Jun ¹ ;

作者机构： 1.South China Agr Univ, Guangdong Prov Key Lab Plant Mol Breeding, Guangzhou 510642, Peoples R China

2.Zhuhai Modern Agr Dev Ctr, Zhuhai 519070, Peoples R China

3.South China Agr Univ, Coll Agr, Guangzhou 510642, Peoples R China

4.Fujian Acad Agr Sci, Tech Res Ctr Dry Crop Variety Breeding Fujian Pro, Crop Res Inst, Fuzhou 350013, Peoples R China

5.Guangdong Acad Agr Sci, Crop Res Inst, Guangdong Prov Key Lab Crop Genet Improvement, Guangzhou 510640, Peoples R China

关键词： maize; ear shank length; transcriptome; regulatory network

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.924； 五年影响因子：6.132 ）

ISSN：

年卷期： 2021 年 22 卷 13 期

页码：

收录情况： SCI

摘要： In maize, the ear shank is a short branch that connects the ear to the stalk. The length of the ear shank mainly affects the transportation of photosynthetic products to the ear, and also influences the dehydration of the grain by adjusting the tightness of the husks. However, the molecular mechanisms of maize shank elongation have rarely been described. It has been reported that the maize ear shank length is a quantitative trait, but its genetic basis is still unclear. In this study, RNA-seq was performed to explore the transcriptional dynamics and determine the key genes involved in maize shank elongation at four different developmental stages. A total of 8145 differentially expressed genes (DEGs) were identified, including 729 transcription factors (TFs). Some important genes which participate in shank elongation were detected via function annotation and temporal expression pattern analyses, including genes related to signal transduction hormones (auxin, brassinosteroids, gibberellin, etc.), xyloglucan and xyloglucan xyloglucosyl transferase, and transcription factor families. The results provide insights into the genetic architecture of maize ear shanks and developing new varieties with ideal ear shank lengths, enabling adjustments for mechanized harvesting in the future.