文献类型： 外文期刊

作者： Yu, Wenkai ¹ ; Yang, Yuting ¹ ; Liu, Liezhao ⁵ ; Li, Zhi ⁶ ; Zhu, Cheng ⁶ ; Hu, Qiong ¹ ; Liu, Jia ¹ ;

作者机构： 1.Chinese Acad Agr Sci, Oil Crops Res Inst, Wuhan 430062, Peoples R China

2.Hubei Hongshan Lab, Wuhan 430070, Peoples R China

3.Chinese Acad Agr Sci, Shenzhen Grad Sch, 7 Pengfei Rd, Longgang 518100, Peoples R China

4.Minist Agr & Rural Affairs, Key Lab Biol & Genet Improvement Oil Crops, Beijing, Peoples R China

5.Southwest Univ, Coll Agron & Biotechnol, Chongqing 400715, Peoples R China

6.Chongqing Acad Agr Sci, Chongqing 401329, Peoples R China

关键词： Rapeseed; GWAS; Total lignin content; Candidate genes; Superior allele

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.9； 五年影响因子：6.0 ）

ISSN： 0926-6690

年卷期： 2024 年 214 卷

页码：

收录情况： SCI

摘要： Lodging is one of the important reasons for rapeseed yield reduction. Increasing the lignin content in aerial part has become an effective way to improve rapeseed lodging resistance. However, knowledge of the genetic basis underlying lignin content in rapeseed is limited. Therefore, we undertook association mapping to identify quantitative trait nucleotides (QTNs) associated with lignin content in the stalk and taproot of 125 natural rapeseed accessions across three independent environments by BLUP mixed line model. Among the natural population, lignin content ranged from 6.05% and 12.76% for the stalk, and 3.21% and 12.33% for the taproot with massive phenotypic variation. Four QTL regions were identified for total lignin content in stalk and taproot, qBnADL.C09.1 and qBnADL.C09.2 with phenotypic variance ranging from 6.05% to 12.76% in stalk and BnADL. A05.1 and qBnADL.A09.1 from 3.21% to 12.33% in taproot. Lignin content significantly differed between superior and alternative alleles, with 4 haplotype groups. We identified 2 putative candidate genes based on the haplotype QTNs for lignin content, e.g., BnLI.C09 and BnRPS17. Combining with the RNA-seq data, identified 3 candidate genes with lignin pathway, e.g., BnLAC17, BnF8H and BnDIR20. This study provides novel insights into the lodging improvement of high lignin content and also facilitates the MAS for low lignin straw selection of rapeseed.