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Using High-Throughput Phenotyping Analysis to Decipher the Phenotypic Components and Genetic Architecture of Maize Seedling Salt Tolerance

文献类型： 外文期刊

作者： Guo, Shangjing 1 ; Lv, Lujia 1 ; Zhao, Yanxin 3 ; Wang, Jinglu 2 ; Lu, Xianju 2 ; Zhang, Minggang 2 ; Wang, Ronghuan 3 ; Zhang, Ying 2 ; Guo, Xinyu 2 ;

作者机构： 1.Liaocheng Univ, Coll Agron, Liaocheng 252059, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Res Ctr Informat Technol, Beijing Key Lab Digital Plant, Beijing 100097, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Maize Res Ctr, Beijing Key Lab Maize DNA DeoxyriboNucle Acid Fing, Beijing 100097, Peoples R China

关键词： maize seedling; salt stress; digital biomass; plant height; normalized difference vegetation index; genome-wide association study

期刊名称：GENES （ 影响因子：3.5； 五年影响因子：3.9 ）

ISSN：

年卷期： 2023 年 14 卷 9 期

页码：

收录情况： SCI

摘要： Soil salinization is a worldwide problem that limits agricultural production. It is important to understand the salt stress tolerance ability of maize seedlings and explore the underlying related genetic resources. In this study, we used a high-throughput phenotyping platform with a 3D laser sensor (Planteye F500) to identify the digital biomass, plant height and normalized vegetation index under normal and saline conditions at multiple time points. The result revealed that a three-leaf period (T3) was identified as the key period for the phenotypic variation in maize seedlings under salt stress. Moreover, we mapped the salt-stress-related SNPs and identified candidate genes in the natural population via a genome-wide association study. A total of 44 candidate genes were annotated, including 26 candidate genes under normal conditions and 18 candidate genes under salt-stressed conditions. This study demonstrates the feasibility of using a high-throughput phenotyping platform to accurately, continuously quantify morphological traits of maize seedlings in different growing environments. And the phenotype and genetic information of this study provided a theoretical basis for the breeding of salt-resistant maize varieties and the study of salt-resistant genes.

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