Construction of a high-density genetic map with whole genome sequencing in Nicotiana tabacum L

Genomics. 2020 Mar;112(2):2028-2033. doi: 10.1016/j.ygeno.2019.11.015. Epub 2019 Nov 21.

Abstract

Tobacco (Nicotiana tabacum L.) is an essential commercial crop and an ideal model plant for biological mechanism studies. As an allopolyploid species, tobacco harbors a massive and complex genome, which makes the application of molecular markers complicated and challenging. In our study, we performed whole-genome sequencing of an intraspecific recombinant inbred line (RIL) population, a F1 generation and their parents. With the Nicotiana tabacum (K326 cultivar) genome as reference, a total of 45,081 markers were characterized to construct the genetic map, which spanned a genetic distance of 3486.78 cM. Evaluation of a two-dimensional heat map proved the high quality of the genetic map. We utilized these markers to anchor scaffolds and analyzed the ancestral genome origin of linkage groups (LGs). Furthermore, such a high-density genetic map will be applied for quantitative trait locus (QTL) detection, gene localization, genome-wide association studies (GWAS), and marker-assisted breeding in tobacco.

Keywords: Genetic linkage map; Resequencing; SNPs; Tobacco.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Contig Mapping
  • Genetic Linkage*
  • Genome, Plant*
  • Nicotiana / genetics*
  • Polymorphism, Single Nucleotide
  • Quantitative Trait Loci
  • Whole Genome Sequencing