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QTL mapping of improving forage maize starch degradability in European elite maize germplasm
Author(s) -
Leng Pengfei,
Ouzunova Milena,
Landbeck Matthias,
Wenzel Gerhard,
Lübberstedt Thomas,
Darnhofer Birte,
Eder Joachim
Publication year - 2019
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12699
Subject(s) - endosperm , quantitative trait locus , biology , germplasm , agronomy , population , forage , starch , doubled haploidy , association mapping , genotype , botany , genetics , gene , food science , single nucleotide polymorphism , demography , sociology
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.