QTL mapping of improving forage maize starch degradability in European elite maize germplasm

Pengfei Leng, Milena Ouzunova, Matthias Landbeck, Gerhard Wenzel, Thomas Lübberstedt, Birte Darnhofer, Joachim Eder

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Improving maize starch content is of great importance for both forage and grain yield. In this study, 13 starch degradability traits were analysed including percentage of the seedling area, floury endosperm, hard endosperm of total grain area, percentage of the floury endosperm surface and vitreousness ratio surface hard: floury endosperm surface, etc. We mapped quantitative trait loci (QTL) in a biparental population of 309 doubled haploid lines based on field phenotyping at two locations. A genetic linkage map was constructed using 168 SSR (simple sequence repeat) markers, which covered 1508 cM of the maize genome, with an average distance of 9.0 cM. Close phenotypic and genotypic correlations were found for all traits, and were all statistically significant (p = 0.01) at two locations. Major QTL for more than two traits were detected, especially in two regions in bins 4.05–4.06 and 7.04–7.05, associated with 13 and 9 traits, respectively. This study contributes to marker-assisted breeding and also to fine mapping candidate genes associated with maize starch degradability.

Original languageEnglish
Pages (from-to)524-533
Number of pages10
JournalPlant Breeding
Volume138
Issue number5
DOIs
StatePublished - 1 Oct 2019

Keywords

  • QTL analysis
  • endosperm
  • forage maize
  • gas production
  • starch degradability

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