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Article

Genome-Wide Identification, Characterization, and Expression Analysis of the NAC Transcription Factor in Chenopodium quinoa

by 1,2, 1,2, 1,2, 1,2, 1,2, 1,2, 1,2, 1,2, 1,2 and 3,*
1
College of Life Science, Shanxi Datong University, Datong 037009, China
2
Research and Development Center of Agricultural Facility Technology, Shanxi Datong University, Datong 037009, China
3
Maize Research Institute, Shanxi Academy of Agricultural Sciences, Xinzhou 034000, China
*
Author to whom correspondence should be addressed.
Genes 2019, 10(7), 500; https://doi.org/10.3390/genes10070500
Received: 26 April 2019 / Revised: 20 June 2019 / Accepted: 26 June 2019 / Published: 30 June 2019
(This article belongs to the Section Plant Genetics and Genomics)
The NAC (NAM, ATAF, and CUC) family is one of the largest families of plant-specific transcription factors. It is involved in many plant growth and development processes, as well as abiotic/biotic stress responses. So far, little is known about the NAC family in Chenopodium quinoa. In the present study, a total of 90 NACs were identified in quinoa (named as CqNAC1-CqNAC90) and phylogenetically divided into 14 distinct subfamilies. Different subfamilies showed diversities in gene proportions, exon–intron structures, and motif compositions. In addition, 28 CqNAC duplication events were investigated, and a strong subfamily preference was found during the NAC expansion in quinoa, indicating that the duplication event was not random across NAC subfamilies during quinoa evolution. Moreover, the analysis of Ka/Ks (non-synonymous substitution rate/synonymous substitution rate) ratios suggested that the duplicated CqNACs might have mainly experienced purifying selection pressure with limited functional divergence. Additionally, 11 selected CqNACs showed significant tissue-specific expression patterns, and all the CqNACs were positively regulated in response to salt stress. The result provided evidence for selecting candidate genes for further characterization in tissue/organ specificity and their functional involvement in quinoa’s strong salinity tolerance. View Full-Text
Keywords: quinoa (Chenopodium quinoa); NAC transcription factor family; phylogenetic analysis; gene expression patterns quinoa (Chenopodium quinoa); NAC transcription factor family; phylogenetic analysis; gene expression patterns
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MDPI and ACS Style

Li, F.; Guo, X.; Liu, J.; Zhou, F.; Liu, W.; Wu, J.; Zhang, H.; Cao, H.; Su, H.; Wen, R. Genome-Wide Identification, Characterization, and Expression Analysis of the NAC Transcription Factor in Chenopodium quinoa. Genes 2019, 10, 500. https://doi.org/10.3390/genes10070500

AMA Style

Li F, Guo X, Liu J, Zhou F, Liu W, Wu J, Zhang H, Cao H, Su H, Wen R. Genome-Wide Identification, Characterization, and Expression Analysis of the NAC Transcription Factor in Chenopodium quinoa. Genes. 2019; 10(7):500. https://doi.org/10.3390/genes10070500

Chicago/Turabian Style

Li, Feng, Xuhu Guo, Jianxia Liu, Feng Zhou, Wenying Liu, Juan Wu, Hongli Zhang, Huifen Cao, Huanzhen Su, and Riyu Wen. 2019. "Genome-Wide Identification, Characterization, and Expression Analysis of the NAC Transcription Factor in Chenopodium quinoa" Genes 10, no. 7: 500. https://doi.org/10.3390/genes10070500

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