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Identification of SNP loci and candidate genes related to four important fatty acid composition in Brassica napus using genome wide association study. | LitMetric

AI Article Synopsis

  • - The study explores the genetic basis of fatty acid composition in rapeseed oil (canola), using a large panel of 300 inbred lines and analyzing 201,187 genetic markers to identify key SNP loci associated with important fatty acids like erucic, oleic, linoleic, and linolenic acids.
  • - Researchers found 148 significant SNP loci related to fatty acid traits and identified 30 SNPs on the A08 and C03 chromosomes that impact erucic, oleic, and linoleic acid levels simultaneously.
  • - Additionally, the study revealed 108 beneficial genetic variations that can enhance oleic and linoleic acid content while reducing erucic acid, along with 20 candidate genes linked

Article Abstract

Rapeseed oil (canola, Brassica napus L.) is an important healthy vegetable oil throughout the world, the nutritional and economical value of which largely depends on its seed fatty acid composition. In this study, based on 201,187 SNP markers developed from the SLAF-seq (specific locus amplified fragment sequencing), a genome wide association study of four important fatty acid content traits (erucic acid, oleic acid, linoleic acid and linolenic acid) in a panel of 300 inbred lines of rapeseed in two environments (JXAU and JXRIS) was carried out. A total of 148 SNP loci significantly associated with these traits were detected by MLM model analysis respectively, and 30 SNP loci on A08 and C03 chromosomes were detected in three traits of erucic acid, oleic acid and linoleic acid contents simultaneously. Furthermore, 108 highly favorable alleles for increasing oleic acid and linoleic acid content, also for decreasing erucic acid content simultaneously were observed. By a basic local alignment search tool (BLAST) search with in a distance of 100 Kb around these significantly SNP-trait associations, we identified 20 orthologs of the functional candidate genes related to fatty acid biosynthesis, including the known vital fatty acid biosynthesis genes of BnaA.FAE1 and BnaC. FAE1 on the A08 and C03 chromosomes, and other potential candidate genes involving in the fatty acid biosynthesis pathway, such as the orthologs genes of FAD2, LACS09, KCS17, CER4, TT16 and ACBP5. This study lays a basis for uncovering the genetic variations and the improvement of fatty acid composition in B. napus.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6707581PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0221578PLOS

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