Genome-Wide Association Study of Salt Tolerance at the Seed Germination Stage in Flax (Linum usitatissimum L.)

Li, Xiao; Guo, Dongliang; Xue, Min; Li, Gongze; Yan, Qingcheng; Jiang, Haixia; Liu, Huiqing; Chen, Jiaxun; Gao, Yanfang; Duan, Lepeng; Xie, Liji

doi:10.3390/genes13030486

Cited by 14 publications

(12 citation statements)

References 73 publications

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“…There is no genome-wide study on wheat seedlings, especially keeping the shoot length, root length, and dry and fresh weights of the shoot and root as tolerance indicators for the association study. However, this phenomenon has also been reported in some crops, e.g., rice ( Shi et al, 2017 ; Batayeva et al, 2018 ; Islam et al, 2022 ), flax ( Li et al, 2022 ), Camelina ( Luo, Szczepanek, and Abdel-Haleem, 2020 ), and barley ( Ahmadi-Ochtapeh et al, 2015 ).…”

Section: Discussionmentioning

confidence: 84%

Genome-wide association studies of seedling quantitative trait loci against salt tolerance in wheat

Khan

Khan²,

Awan³

et al. 2022

Front. Genet.

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Salinity is one of the significant factors in decreasing wheat yield and quality. To counter this, it is necessary to develop salt-tolerant wheat varieties through conventional and advanced molecular techniques. The current study identified quantitative trait loci in response to salt stress among worldwide landraces and improved varieties of wheat at the seedling stage. A total of 125 landraces and wheat varieties were subjected to salt treatment (50, 100, and 150 mM) with control. Morphological seedling traits, i.e., shoot length, root length, and fresh and dry shoot and root weights for salinity tolerance were observed to assess salt tolerance and genetic analysis using SNP data through DArT-seq. The results showed that, at the seedling stage, 150 mM NaCl treatment decreased shoot length, root length, and fresh and dry weights of the shoot and root. The root length and dry root weight were the most affected traits at the seedling stage. Effective 4417 SNPs encompassing all the chromosomes of the wheat genome with marker density, i.e., 37%, fall in genome B, genome D (32%), and genome A (31%). Five loci were found on four chromosomes 6B, 6D, 7A, and 7D, showing strong associations with the root length, fresh shoot weight, fresh root weight, and dry root weight at the p < 0.03 significance level. The positive correlation was found among all morphological traits under study.

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Section: Discussionmentioning

confidence: 84%

Genome-wide association studies of seedling quantitative trait loci against salt tolerance in wheat

Khan

Khan²,

Awan³

et al. 2022

Front. Genet.

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“…OsABA8ox1 -kd overexpressing seedlings had a higher level of ABA, reduced ROS contents, and Na + /K + ratio under salinity stress compared to non-transgenic plants ( Liu et al, 2022c ). Genetic engineering has achieved a landmark position in molecular breeding because of its role in developing several tolerant crop cultivars ( Li et al, 2022a ; Liu et al, 2022b ).…”

Section: Applications Of Genetic Engineering To Breed Salt-tolerant Ricementioning

confidence: 99%

Molecular tools, potential frontiers for enhancing salinity tolerance in rice: A critical review and future prospective

Rasheed

Nawaz

et al. 2022

Front. Plant Sci.

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Improvement of salinity tolerance in rice can minimize the stress-induced yield losses. Rice (Oryza sativa) is one of Asia’s most widely consumed crops, native to the subtropical regions, and is generally associated with sensitivity to salinity stress episodes. Salt-tolerant rice genotypes have been developed using conventional breeding methods; however, the success ratio is limited because of the complex nature of the trait and the high cost of development. The narrow genetic base of rice limited the success of conventional breeding methods. Hence, it is critical to launch the molecular tools for screening rice novel germplasm for salt-tolerant genes. In this regard, the latest molecular techniques like quantitative trait loci (QTL) mapping, genetic engineering (GE), transcription factors (TFs) analysis, and clustered regularly interspaced short palindromic repeats (CRISPR) are reliable for incorporating the salt tolerance in rice at the molecular level. Large-scale use of these potent genetic approaches leads to identifying and editing several genes/alleles, and QTL/genes are accountable for holding the genetic mechanism of salinity tolerance in rice. Continuous breeding practices resulted in a huge decline in rice genetic diversity, which is a great worry for global food security. However, molecular breeding tools are the only way to conserve genetic diversity by exploring wild germplasm for desired genes in salt tolerance breeding programs. In this review, we have compiled the logical evidences of successful applications of potent molecular tools for boosting salinity tolerance in rice, their limitations, and future prospects. This well-organized information would assist future researchers in understanding the genetic improvement of salinity tolerance in rice.

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“…Previous studies have investigated the salinity response in flax using a variety of techniques [4]. A total of 902 single nucleotide polymorphisms (SNPs) were detected by a Genome-wide Association Study (GWAS) of 200 diverse flax varieties following saline stress [4]. They also found that oil flax was more tolerant than fiber flax under saline Plants 2022, 11, 2053 2 of 20 stress [4].…”

Section: Introductionmentioning

confidence: 99%

“…A total of 902 single nucleotide polymorphisms (SNPs) were detected by a Genome-wide Association Study (GWAS) of 200 diverse flax varieties following saline stress [4]. They also found that oil flax was more tolerant than fiber flax under saline Plants 2022, 11, 2053 2 of 20 stress [4]. Differentially expressed genes were also identified following NaCl treatment in the fiber flax variety Agatha [5].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Analysis of Differentially Expressed Genes and Epigenetic Modification-Related Expression Variation Induced by Saline Stress at Seedling Stage in Fiber and Oil Flax, Linum usitatissimum L.

Wang

Lin

et al. 2022

Plants

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The ability of different germplasm to adapt to a saline–alkali environment is critical to learning about the tolerance mechanism of saline–alkali stress in plants. Flax is an important oil and fiber crop in many countries. However, its molecular tolerance mechanism under saline stress is still not clear. In this study, we studied morphological, physiological characteristics, and gene expression variation in the root and leaf in oil and fiber flax types under saline stress, respectively. Abundant differentially expressed genes (DEGs) induced by saline stress, tissue/organ specificity, and different genotypes involved in plant hormones synthesis and metabolism and transcription factors and epigenetic modifications were detected. The present report provides useful information about the mechanism of flax response to saline stress and could lead to the future elucidation of the specific functions of these genes and help to breed suitable flax varieties for saline/alkaline soil conditions.

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Genome-Wide Association Study of Salt Tolerance at the Seed Germination Stage in Flax (Linum usitatissimum L.)

Cited by 14 publications

References 73 publications

Genome-wide association studies of seedling quantitative trait loci against salt tolerance in wheat

Genome-wide association studies of seedling quantitative trait loci against salt tolerance in wheat

Molecular tools, potential frontiers for enhancing salinity tolerance in rice: A critical review and future prospective

Comprehensive Analysis of Differentially Expressed Genes and Epigenetic Modification-Related Expression Variation Induced by Saline Stress at Seedling Stage in Fiber and Oil Flax, Linum usitatissimum L.

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