title: Genome-wide association mapping and Identification of candidate genes for fatty acid composition in Brassica napus L. using SNP markers.
abstract: B. napus (oilseed) is an important source of edible vegetable oil, and its nutritional and economic value is determined by its fatty acid composition and content.
  
  
  
  Using the Brassica 60 K SNP array, we performed a genome-wide association study of fatty acid composition in a population of 520 genetically diverse oilseed accessions. Using the PCA + K model in TASSEL 5.2.1, we identified 62 genomic regions that were significantly associated with the composition of seven fatty acids, and five consensus regions that mapped to the A2, A8, A9, C1, and C3 chromosomes, respectively, of the Brassica napus Darmor-bzh genome. We then identified 24 orthologs of the functional candidate genes involved in fatty acid biosynthesis, excluding BnaA.FAE1 and BnaC.FAE1 on the A8 and C3 homologous genome blocks, which are known to have critical roles in the fatty acid biosynthesis pathway, and potential orthologs of these genes (e.g., LACS9, KCR1, FAB1, LPAT4, KCS17, CER4, TT16, and ACBP5).
  
  
  
  Our results demonstrate the power of association mapping in identifying genes of interest in B. napus and provide insight into the genetic basis of fatty acid biosynthesis in B. napus. Furthermore, our findings may facilitate marker-based breeding efforts aimed at improving fatty acid composition and quality in B. napus.
authors.affiliation: Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China.|Engineering Research Center of South Upland Agriculture of Ministry of Education, Southwest University, Beibei, Chongqing, 400716, China.
authors.forename: Cunmin
authors.identifier: 0000-0003-2413-2350
authors.initials: C
authors.lastname: Qu
authors.affiliation: Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China.|Engineering Research Center of South Upland Agriculture of Ministry of Education, Southwest University, Beibei, Chongqing, 400716, China.
authors.forename: Ledong
authors.initials: L
authors.lastname: Jia
authors.affiliation: Department of Botany and Plant Pathology, Purdue University, 915 W. State Street, West Lafayette, IN, 47907-2054, USA.
authors.forename: Fuyou
authors.initials: F
authors.lastname: Fu
authors.affiliation: Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China.|Engineering Research Center of South Upland Agriculture of Ministry of Education, Southwest University, Beibei, Chongqing, 400716, China.
authors.forename: Huiyan
authors.initials: H
authors.lastname: Zhao
authors.affiliation: Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China.|Engineering Research Center of South Upland Agriculture of Ministry of Education, Southwest University, Beibei, Chongqing, 400716, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Lu
authors.affiliation: Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China.|Engineering Research Center of South Upland Agriculture of Ministry of Education, Southwest University, Beibei, Chongqing, 400716, China.
authors.forename: Lijuan
authors.initials: L
authors.lastname: Wei
authors.affiliation: Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China.|Engineering Research Center of South Upland Agriculture of Ministry of Education, Southwest University, Beibei, Chongqing, 400716, China.
authors.forename: Xinfu
authors.initials: X
authors.lastname: Xu
authors.affiliation: Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China.|Engineering Research Center of South Upland Agriculture of Ministry of Education, Southwest University, Beibei, Chongqing, 400716, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Liang
authors.affiliation: Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China.|Engineering Research Center of South Upland Agriculture of Ministry of Education, Southwest University, Beibei, Chongqing, 400716, China.
authors.forename: Shimeng
authors.initials: S
authors.lastname: Li
authors.affiliation: Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China. ruiwang71@163.com.|Engineering Research Center of South Upland Agriculture of Ministry of Education, Southwest University, Beibei, Chongqing, 400716, China. ruiwang71@163.com.
authors.forename: Rui
authors.initials: R
authors.lastname: Wang
authors.affiliation: Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400716, China. ljn1950@swu.edu.cn.|Engineering Research Center of South Upland Agriculture of Ministry of Education, Southwest University, Beibei, Chongqing, 400716, China. ljn1950@swu.edu.cn.
authors.forename: Jiana
authors.initials: J
authors.lastname: Li
mesh_terms: D029688:Brassica napus / Q000235:genetics*; D002874:Chromosome Mapping; D018744:DNA, Plant / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism; D005227:Fatty Acids / Q000096:biosynthesis / Q000737:chemistry*; D018745:Genome, Plant; D055106:Genome-Wide Association Study; D006239:Haplotypes; D015810:Linkage Disequilibrium; D010641:Phenotype; D010940:Plant Proteins / Q000235:genetics; D020641:Polymorphism, Single Nucleotide
chemical_list: D018744:DNA, Plant; D005227:Fatty Acids; D010940:Plant Proteins
keywords: Association mapping; Brassica napus L; Candidate gene; Fatty acid components; Single Nucleotide Polymorphism (SNP)