Journal of Agricultural Science and Technology ›› 2024, Vol. 26 ›› Issue (12): 18-29.DOI: 10.13304/j.nykjdb.2024.0895

• BIOTECHNOLOGY & LIFE SCIENCE • Previous Articles     Next Articles

Discovering of Candidate Genes for Wheat SDS-Sedimentation Value Using Association Study and Development of KASP Marker

Haixia LIU(), Yinhui ZHANG, Lei ZHUANG, Mengjiao GUO, Li ZHAO, Meijuan WU, Jian HOU, Tian LI, Hongxia LIU, Xueyong ZHANG, Chenyang HAO()   

  1. State Key Laboratory of Crop Gene Resources and Breeding,National Key Facility for Crop Gene Resources and Genetic Improvement,Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China
  • Received:2024-10-31 Accepted:2024-11-15 Online:2024-12-15 Published:2024-12-17
  • Contact: Chenyang HAO

基于关联分析挖掘小麦SDS沉降值相关候选基因及KASP标记开发

刘海霞(), 张寅辉, 庄蕾, 郭梦娇, 赵李, 吴美娟, 侯健, 李甜, 刘红霞, 张学勇, 郝晨阳()   

  1. 中国农业科学院作物科学研究所,作物基因资源与育种全国重点实验室,农作物基因资源与基因改良国家重大科学工程,北京 100081
  • 通讯作者: 郝晨阳
  • 作者简介:刘海霞E-mail: 82101222231@caas.cn
  • 基金资助:
    农业生物育种国家科技重大专项(2022ZD04017);国家重点研发计划项目(2023YFD1200404)

Abstract:

SDS sedimentation value is an important indicator for wheat quality breeding. In this study, genome-wide association study (GWAS) on SDS-sedimentation value was performed in 145 wheat accessions. The results revealed that a cluster of significant signals was identified at the end of 3DL, and combined with the position of the peak SNP and the distance of LD decay, the candidate interval 587.514~589.514 Mb was further determined. Then, variation sites of candidate genes within this region were explored based on the resequencing data (http://wheat.cau.edu.cn/WheatUnion/), and candidate gene association study (CGAS) was conducted in combination with SDS-sedimentation value. By integrating association results, gene annotation and gene expression analysis, TraesCS3D03G1092400 was identified as the SDS-sedimentation value-related candidate gene, and was tentatively named TaAGAP-3D. Additionally, a KASP marker Sv-3D-KASP for breeding was developed based on the polymorphic SNP of this gene, and found that TaAGAP-3D(C) was a favorable allele for SDS-sedimentation value. Altogether, these findings provide an effective molecular marker for the genetic improvement of SDS-sedimentation value in wheat, and also provide a reference for further cloning of quality genes.

Key words: common wheat, SDS-sedimentation value, genome-wide association study, candidate gene association study, KASP marker

摘要:

SDS沉降值是小麦品质育种的一项重要指标。对145份小麦品种的SDS沉降值进行了全基因组关联分析,在染色体3DL末端鉴定到成簇的显著信号,结合peak SNP的位置与LD衰减距离锁定587.514~589.514 Mb为候选区段;利用重测序数据(http://wheat.cau.edu.cn/WheatUnion/)发掘该区段内候选基因的变异位点,再对SDS沉降值的候选基因进行关联分析。综合关联结果、基因注释和基因表达分析,获得沉降值相关候选基因TraesCS3D03G1092400,命名为TaAGAP-3D。基于该基因的多态性SNP位点开发了可供育种利用的KASP标记Sv-3D-KASP,发现TaAGAP-3D(C)为SDS沉降值相关的优异等位变异。研究结果将为小麦SDS沉降值的遗传改良提供有效分子标记,同时也为进一步克隆品质基因提供参考。

关键词: 小麦, SDS沉降值, 全基因组关联分析, 候选基因关联分析, KASP标记

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