Low validation rate of quantitative trait loci for Gibberella ear rot resistance in European maize

Key message Six quantitative trait loci (QTL) for Gibberella ear rot resistance in maize were tested in two different genetic backgrounds; three QTL displayed an effect in few near isogenic line pairs. Few quantitative trait loci (QTL) mapping studies for Gibberella ear rot (GER) have been conducted...

Full description

Saved in:
Bibliographic Details
Published in:Theoretical and applied genetics 2017, Vol.130 (1), p.175-186
Main Authors: Brauner, Pedro Correa, Melchinger, Albrecht E., Schrag, Tobias A., Utz, H. Friedrich, Schipprack, Wolfgang, Kessel, Bettina, Ouzunova, Milena, Miedaner, Thomas
Format: Article
Language:English
Subjects:
Agriculture
Analysis
Biochemistry
Biomedical and Life Sciences
Biotechnology
Chromosome Mapping
Corn
Crosses, Genetic
Disease resistance (Plants)
Disease Resistance - genetics
Diseases and pests
Genetic aspects
Genetic Linkage
Genotype
Gibberella
Health aspects
Infections
Life Sciences
Original Article
Phenotype
Plant Biochemistry
Plant Breeding
Plant Breeding/Biotechnology
Plant Diseases - genetics
Plant Diseases - microbiology
Plant fungal diseases
Plant Genetics and Genomics
Polymorphism, Single Nucleotide
Quantitative Trait Loci
Trichothecenes - analysis
Zea mays
Zea mays - genetics
Zea mays - microbiology
Zearalenone - analysis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Key message Six quantitative trait loci (QTL) for Gibberella ear rot resistance in maize were tested in two different genetic backgrounds; three QTL displayed an effect in few near isogenic line pairs. Few quantitative trait loci (QTL) mapping studies for Gibberella ear rot (GER) have been conducted, but no QTL have been verified so far. QTL validation is prudent before their implementation into marker-assisted selection (MAS) programs. Our objectives were to (1) validate six QTL for GER resistance, (2) evaluate the QTL across two genetic backgrounds, (3) investigate the genetic background outside the targeted introgressions. Pairs of near isogenic lines (NILs) segregating for a single QTL ( Qger1 , Qger2 , Qger10 , Qger13 , Qger16 , or Qger21 ) were developed by recurrent backcross until generation BC 3 S 2 . Donor parents (DP) carrying QTL were backcrossed to a susceptible (UH009) and a moderately resistant (UH007) recurrent parent. MAS was performed using five SNP markers covering a region of 40 cM around each QTL. All NILs were genotyped with the MaizeSNP50 assay and phenotyped for GER severity and deoxynivalenol and zearalenone content. Traits were significantly ( P  
ISSN:0040-5752
1432-2242
DOI:10.1007/s00122-016-2802-3