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利用全基因组关联分析鉴定玉米幼苗耐旱候选基因

Identification of Candidate Genes for Drought Tolerance at Maize Seedlings Using Genome-Wide Association.

作者信息

Liu Wenping, Li Shufang, Zhang Chunxiao, Jin Fengxue, Li Wanjun, Li Xiaohui

机构信息

Crop Germplasm Resources Institute, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, Jilin, China.

Taonan Research Center, Jilin Academy of Agricultural Sciences, Taonan 137100, Jilin, China.

出版信息

Iran J Biotechnol. 2021 Jul 1;19(3):e2637. doi: 10.30498/ijb.2021.209324.2637. eCollection 2021 Jul.

DOI:10.30498/ijb.2021.209324.2637
PMID:34825009
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8590722/
Abstract

BACKGROUND

Drought stress is a serious threat that limit maize growth and production.

OBJECTIVES

The assessment tolerance level of maize by measuring changes in the main biochemical and physiological indicators under drought stress.

MATERIAL AND METHODS

We performed a genome-wide association analysis of biochemical and physiological indicators using an elite association panel.

RESULTS

The results revealed that eight significant SNPs (p<0.05/N) located in eight genes that are distributed on different chromosomes were associated with drought resistance indices under drought stress. Among these genes, four genes were linked via the associated SNPs with drought-resistance indices of the malondialdehyde activity (MDA), three genes were linked with drought resistance indexes of the superoxide dismutase activity (SOD), and one gene was linked with drought resistance indexes of relative conductivity (REC). The candidate genes functioned as transcription factors, enzymes, and transporters, which included trehalase, the transcription factor, and glutathione S-transferase and also encoded a gene of unknown function. These genes may be directly or indirectly involved in drought resistance. The expression levels of responded to ABA and drought stress.

CONCLUSIONS

These results provided good information to understand the genetic basis of variation in drought resistance indices of biochemical and physiological indicators during drought stress.

摘要

背景

干旱胁迫是限制玉米生长和产量的严重威胁。

目的

通过测量干旱胁迫下主要生化和生理指标的变化来评估玉米的耐受水平。

材料与方法

我们使用一个精英关联群体对生化和生理指标进行全基因组关联分析。

结果

结果显示，位于不同染色体上的8个基因中的8个显著单核苷酸多态性（p<0.05/N）与干旱胁迫下的抗旱指标相关。在这些基因中，4个基因通过相关单核苷酸多态性与丙二醛活性（MDA）的抗旱指标相关联，3个基因与超氧化物歧化酶活性（SOD）的抗旱指标相关联，1个基因与相对电导率（REC）的抗旱指标相关联。候选基因发挥转录因子、酶和转运蛋白的作用，其中包括海藻糖酶、转录因子和谷胱甘肽S-转移酶，还编码一个功能未知的基因。这些基因可能直接或间接参与抗旱。其表达水平对脱落酸和干旱胁迫有响应。

结论

这些结果为理解干旱胁迫期间生化和生理指标抗旱指标变异的遗传基础提供了良好信息。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c23/8590722/e65b84559da3/IJB-19-e2637-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c23/8590722/d6e08ffdf105/IJB-19-e2637-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c23/8590722/3ba92b55d8b0/IJB-19-e2637-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c23/8590722/e65b84559da3/IJB-19-e2637-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c23/8590722/d6e08ffdf105/IJB-19-e2637-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c23/8590722/3ba92b55d8b0/IJB-19-e2637-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c23/8590722/e65b84559da3/IJB-19-e2637-g003.jpg

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