QTL mapping of improving forage maize starch degradability in European elite maize germplasm
Improving maize starch content is of great importance for both forage and grain yield. In this study, 13 starch degradability traits were analyzed 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 (DHL) 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.
This is the peer reviewed version of the following article: Leng, Pengfei, Milena Ouzunova, Matthias Landbeck, Gerhard Wenzel, Thomas Lübberstedt, Birte Darnhofer, and Joachim Eder. "QTL mapping of improving forage maize starch degradability in European elite maize germplasm." Plant Breeding, which has been published in final form at doi: 10.1111/pbr.12699. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.