Qtl mapping and phenotypic variation for seedling vigour traits in barley (Hordeum vulgare l.)

Ludovic J.A. Capo‐chichi, Sharla Eldridge, Ammar Elakhdar, Takahiko Kubo, Robert Brueggeman, Anthony O. Anyia

Research output: Contribution to journalArticlepeer-review

Abstract

Seed vigour is considered a critical stage for barley production, and cultivars with early seedling vigour (ESV) facilitate rapid canopy formation. In this study, QTLs for 12 ESV‐related traits were mapped using 185 RILs derived from a Xena x H94061120 evaluated across six independent environments. DArT markers were used to develop a genetic map (1075.1 cM; centimorgans) with an average adjacent‐marker distance of 3.28 cM. In total, 46 significant QTLs for ESV‐related traits were detected. Fourteen QTLs for biomass yield were found on all chromosomes, two of them co-localized with QTLs on 1H for grain yield. The related traits: length of the first and second leaves and dry weight of the second leaf, biomass yield and grain yield, had high heritability (>30%). Mean-while, a significant correlation was observed between grain yield and biomass yield, which provided a clear image of these traits in the selection process. Our results demonstrate that a pleiotropic QTL related to the specific leaf area of the second leaf, biomass yield, and grain yield was linked to the DArT markers bPb‐9280 and bPb‐9108 on 1H, which could be used to significantly improve seed vigour by marker‐assisted selection and facilitate future map‐based cloning efforts.

Original languageEnglish
Article number1149
JournalPlants
Volume10
Issue number6
DOIs
Publication statusPublished - Jun 2021

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science

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