RRC ID 36135
Author Wu D, Sato K, Ma JF.
Title Genome-wide association mapping of cadmium accumulation in different organs of barley.
Journal New Phytol
Abstract The threshold value of cadmium (Cd) concentration in grains of barley (Hordeum vulgare) is the lowest among cereal crops; however, it is poorly understood how Cd accumulation in barley grain is genetically controlled. We investigated genotypic variation in Cd accumulation of different organs in 100 accessions from a subset of the barley core collection using both hydroponic and Cd-contaminated soil culture. We also performed a genome-wide association (GWA) mapping for Cd accumulation in different organs. A large genotypic variation in the Cd concentration was found in all organs. There was a good correlation between shoot Cd of solution and soil culture, the shoot Cd and grain Cd, but no correlation between the root Cd and grain Cd. GWA mapping detected 9 quantitative trait loci (QTL) for root Cd, 21 for shoot Cd, 14 for root-to-shoot translocation and 15 for grain Cd. A common QTL for the shoot Cd and root-to-shoot translocation was found at 132.6 cM on chromosome 5H. Two major QTL for grain Cd were identified on chromosome 2H and chromosome 5H. The genetic variation in Cd accumulation and major QTL detected provide useful information helpful for cloning candidate genes for Cd accumulation and breeding low-Cd barley cultivars in future.
Volume 208(3)
Pages 817-29
Published 2015-11-1
DOI 10.1111/nph.13512
PMID 26061418
MeSH Cadmium / metabolism* Genome-Wide Association Study Genotype Hordeum / genetics* Hordeum / metabolism* Plant Roots / metabolism Plant Shoots / metabolism Quantitative Trait Loci
IF 8.512
Times Cited 30
Barley Barley seed samples