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A high -quality genome assembly of quinoa provides insights into the molecular basis of salt bladder-based salinity tolerance and the exceptional nutritional value

Citation

Zou, C and Chen, A and Xiao, L and Muller, HM and Ache, P and Haberer, G and Zhang, M and Jia, W and Deng, P and Huang, R and Lang, D and Li, F and Zhan, D and Wu, X and Zhang, H and Bohm, J and Renyi, L and Shabala, S and Hedrich, R and Zhu, J-K and Zhang, H, A high -quality genome assembly of quinoa provides insights into the molecular basis of salt bladder-based salinity tolerance and the exceptional nutritional value, Cell Research, 27, (11) pp. 1327-1340. ISSN 1001-0602 (2017) [Refereed Article]


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DOI: doi:10.1038/cr.2017.124

Abstract

Chenopodium quinoa is a halophytic pseudocereal crop that is being cultivated in an ever-growing number of countries. Because quinoa is highly resistant to multiple abiotic stresses and its seed has a better nutritional value than any other major cereals, it is regarded as a future crop to ensure global food security. We generated a high-quality genome draft using an inbred line of the quinoa cultivar Real. The quinoa genome experienced one recent genome duplication about 4.3 million years ago, likely reflecting the genome fusion of two Chenopodium parents, in addition to the γ paleohexaploidization reported for most eudicots. The genome is highly repetitive (64.5% repeat content) and contains 54 438 protein-coding genes and 192 microRNA genes, with more than 99.3% having orthologous genes from glycophylic species. Stress tolerance in quinoa is associated with the expansion of genes involved in ion and nutrient transport, ABA homeostasis and signaling, and enhanced basal-level ABA responses. Epidermal salt bladder cells exhibit similar characteristics as trichomes, with a significantly higher expression of genes related to energy import and ABA biosynthesis compared with the leaf lamina. The quinoa genome sequence provides insights into its exceptional nutritional value and the evolution of halophytes, enabling the identification of genes involved in salinity tolerance, and providing the basis for molecular breeding in quinoa.

Item Details

Item Type:Refereed Article
Keywords:quinoa; genome; transporters; salinity; nutrition
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Bohm, J (Ms Jennifer Bohm)
Author:Shabala, S (Dr Lana Shabala)
ID Code:122884
Year Published:2017
Deposited By:Agriculture and Food Systems
Deposited On:2017-12-05
Last Modified:2017-12-07
Downloads:0

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