Identification of Quantitative Trait Loci and Candidate Genes for Maize Starch Granule Size through Association Mapping.

ABSTRACT: Starch is an important nutrient component of maize kernels, and starch granule size largely determines kernel waxiness, viscosity, and other physiochemical and processing properties. To explore the genetic basis of maize starch granule size, 266 tropical, subtropical, and temperate inbred lines were subjected to genome-wide association analyses with an array of 56,110 random single nucleotide polymorphisms (SNPs). In the present panel, the kernel starch granule size ranged from 7-15.8 µm long and 6.8-14.3 µm wide. Fourteen significant SNPs were identified as being associated with the length of starch granules and 9 with their width. One linkage disequilibrium block flanking both sides of a significant SNP was defined as a quantitative trait locus (QTL) interval, and seven QTLs were mapped

SUBMITTER: Liu N 

PROVIDER: S-EPMC6155146 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature