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亚麻（ L.）种子萌发阶段耐盐性的全基因组关联研究。

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

机构信息

Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi 830046, China.

出版信息

Genes (Basel). 2022 Mar 10;13(3):486. doi: 10.3390/genes13030486.

DOI:10.3390/genes13030486
PMID:35328040
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8949523/
Abstract

Soil salinization seriously affects the growth and distribution of flax. However, there is little information about the salt tolerance of flax. In this study, the salt tolerance of 200 diverse flax accessions during the germination stage was evaluated, and then the Genome-wide Association Study (GWAS) was carried out based on the relative germination rate (RGR), relative shoot length (RSL) and relative root length (RRL), whereby quantitative trait loci (QTLs) related to salt tolerance were identified. The results showed that oil flax had a better salt tolerance than fiber flax. A total of 902 single nucleotide polymorphisms (SNPs) were identified on 15 chromosomes. These SNPs were integrated into 64 QTLs, explaining 14.48 to 29.38% () of the phenotypic variation. In addition, 268 candidate genes were screened by combining previous transcriptome data and homologous gene annotation. Among them, is a single-point SNP repeat mapping gene, which encodes a Glutathione S-transferase (GST). This study is the first to use GWAS to excavate genes related to salt tolerance during the germination stage of flax. The results of this study provide important information for studying the genetic mechanism of salt tolerance of flax, and also provide the possibility to improve the salt tolerance of flax.

摘要

土壤盐渍化严重影响亚麻的生长和分布。然而，关于亚麻耐盐性的信息却很少。本研究评估了 200 个不同亚麻品种在发芽阶段的耐盐性，然后基于相对发芽率（RGR）、相对苗长（RSL）和相对根长（RRL）进行全基因组关联研究（GWAS），从而鉴定与耐盐性相关的数量性状位点（QTLs）。结果表明，油用亚麻比纤维用亚麻具有更好的耐盐性。在 15 条染色体上共鉴定出 902 个单核苷酸多态性（SNP）。这些 SNP 被整合到 64 个 QTL 中，解释了 14.48%至 29.38%（）的表型变异。此外，通过结合先前的转录组数据和同源基因注释，筛选出 268 个候选基因。其中，是一个单点 SNP 重复映射基因，编码谷胱甘肽 S-转移酶（GST）。本研究首次利用 GWAS 挖掘了亚麻发芽阶段耐盐性相关基因。本研究的结果为研究亚麻耐盐性的遗传机制提供了重要信息，也为提高亚麻耐盐性提供了可能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/5c0d771196b7/genes-13-00486-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/deeb9e2dd358/genes-13-00486-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/12d9ab00dd88/genes-13-00486-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/a2cc13d030ef/genes-13-00486-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/b46fc7c98dcf/genes-13-00486-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/5c0d771196b7/genes-13-00486-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/deeb9e2dd358/genes-13-00486-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/12d9ab00dd88/genes-13-00486-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/a2cc13d030ef/genes-13-00486-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/b46fc7c98dcf/genes-13-00486-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce12/8949523/5c0d771196b7/genes-13-00486-g005.jpg

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