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Natural variations in the non-coding region of ZmNAC080308 contributes maintaining grain yield under drought stress in maize

Creator: Nan Wang
Creator: Ming Cheng
Creator: Yong Chen
Creator: Bojuan Liu
Creator: Xiaonan Wang
Creator: Guojun Li
Creator: Yueheng Zhou
Creator: Ping Luo
Creator: Zhangying Xi
Creator: Hongjun Yong
Creator: Degui Zhang
Creator: Mingshun Li
Creator: Zhang, X.
Creator: San Vicente, F.M.
Creator: Zhuanfang Hao
Creator: Xinhai Li
Year: 2021
Language: English
Publisher: BioMed Central
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Type: Article
Place of Publication: Switzerland
Issue: 1
Volume: 21
DOI: 10.1186/s12870-021-03072-9
Keywords: NAC Transcription Factor
Keywords: Natural Variations
Keywords: Non-Coding Region
Description: Background: Natural variations derived from both evolutionary selection and genetic recombination, presume to have important functions to respond to various abiotic stresses, which could be used to improve drought tolerance via genomic selection. Results: In the present study, the NAC-encoding gene of ZmNAC080308 was cloned and sequenced in 199 inbred lines in maize. Phylogenetic analysis showed that ZmNAC080308 is closely clusteredinto the same group with other well-known NAC genes responding to improve drought tolerance. In total, 86 SNPs and 47 InDels were identified in the generic region of ZmNAC080308, 19 of these variations were associated with GY (grain yield) in different environments. Nine variations in the 5’-UTR region of ZmNAC080308 are closely linked, they might regulate the gene expression and respond to improve GY under drought condition via Sp1-mediated transactivation. Two haplotypes (Hap1 and Hap2) identified in the, 5’-UTR region using the nine variations, and Hap2 containing insertion variants, exhibited 15.47 % higher GY under drought stress condition. Further, a functional marker was developed to predict the drought stress tolerance in a US maize inbred line panel. Lines carrying Hap2 exhibited > 10 % higher GY than those carrying Hap1 under drought stress condition. In Arabidopsis, overexpression ZmNAC080308 enhanced drought tolerance. Conclusions: ZmNAC080308 is an important gene responding to drought tolerance, a functional marker is developed for improving maize drought tolerance by selecting this gene.
Agrovoc: MAIZE
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ISSN: 1471-2229
Journal: BMC Plant Biology
Article number: 305

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  • Maize
    Maize breeding, phytopathology, entomology, physiology, quality, and biotech

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