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Type: Journal article
Title: Salinity tolerance in soybean is modulated by natural variation in GmSALT3
Author: Guan, R.
Qu, Y.
Guo, Y.
Yu, L.
Liu, Y.
Jiang, J.
Chen, J.
Ren, Y.
Liu, G.
Tian, L.
Jin, L.
Liu, Z.
Hong, H.
Chang, R.
Gilliham, M.
Qiu, L.
Citation: Plant Journal, 2014; 80(6):937-950
Publisher: Wiley
Issue Date: 2014
ISSN: 0960-7412
Statement of
Rongxia Guan, Yue Qu, Yong Guo, Lili Yu, Ying Liu, Jinghan Jiang, Jiangang Chen, Yulong Ren, Guangyu Liu, Lei Tian, Longguo Jin, Zhangxiong Liu, Huilong Hong, Ruzhen Chang, Matthew Gilliham, and Lijuan Qiu
Abstract: The identification of genes that improve the salt tolerance of crops is essential for the effective utilization of saline soils for agriculture. Here, we use fine mapping in a soybean (Glycine max (L.) Merr.) population derived from the commercial cultivars Tiefeng 8 and 85-140 to identify GmSALT3 (salt tolerance-associated gene on chromosome 3), a dominant gene associated with limiting the accumulation of sodium ions (Na+) in shoots and a substantial enhancement in salt tolerance in soybean. GmSALT3 encodes a protein from the cation/H+ exchanger family that we localized to the endoplasmic reticulum and which is preferentially expressed in the salt-tolerant parent Tiefeng 8 within root cells associated with phloem and xylem. We identified in the salt-sensitive parent, 85-140, a 3.78-kb copia retrotransposon insertion in exon 3 of Gmsalt3 that truncates the transcript. By sequencing 31 soybean landraces and 22 wild soybean (Glycine soja) a total of nine haplotypes including two salt-tolerant haplotypes and seven salt-sensitive haplotypes were identified. By analysing the distribution of haplotypes among 172 Chinese soybean landraces and 57 wild soybean we found that haplotype 1 (H1, found in Tiefeng 8) was strongly associated with salt tolerance and is likely to be the ancestral allele. Alleles H2-H6, H8 and H9, which do not confer salinity tolerance, were acquired more recently. H1, unlike other alleles, has a wide geographical range including saline areas, which indicates it is maintained when required but its potent stress tolerance can be lost during natural selection and domestication. GmSALT3 is a gene associated with salt tolerance with great potential for soybean improvement.
Keywords: Glycine max (L.) Merr.; Glycine soja Sieb. et Zucc; salt tolerance; natural variation; salt exclusion; haplotype; geographical distribution; CHX20; CHX
Rights: © 2014 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
RMID: 0030018487
DOI: 10.1111/tpj.12695
Grant ID:
Appears in Collections:Agriculture, Food and Wine publications

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