Identification of QTLs associated with potassium use efficiency and underlying candidate genes by whole-genome resequencing of two parental lines in Brassica napus

Wei Wang, Jinsong Zou, Philip J White, Guangda Ding, Yalin Li, Fangsen Xu, Lei Shi (Lead / Corresponding author)

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Breeding crops that acquire and/or utilize potassium (K) more effectively could reduce the use of K fertilizers. Sixteen traits affecting K use efficiency (KUE) at the seedling stage were investigated in a B. napus double haploid population grown at an optimal K supply (OK) and a low K supply (LK) in a hydroponic culture system. In total, 50 and 62 QTLs associated with these traits were identified at OK and LK, respectively. A total of 25 orthologues of 23 Arabidopsis genes regulating K transport were identified in the confidence intervals of nine QTLs impacting shoot dry weight at LK, and 22 of these showed variations in coding sequences and/or exhibited significant differences in mRNA abundances in roots at LK between the two parental lines. This study provided insights to the genetic basis of KUE in B. napus, which will accelerate the breeding of K-efficient rapeseed cultivars by marker-assisted selection.

Original languageEnglish
Pages (from-to)755-768
Number of pages14
JournalGenomics
Volume113
Issue number2
Early online date29 Jan 2021
DOIs
Publication statusPublished - Mar 2021

Keywords

  • Brassica napus/genetics
  • INDEL Mutation
  • Ion Transport
  • Plant Proteins/genetics
  • Polymorphism, Single Nucleotide
  • Potassium/metabolism
  • Quantitative Trait Loci

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