Genetic variation and association mapping of grain iron and zinc contents in synthetic hexaploid wheat germplasm

Fe and Zn deficiency are widespread worldwide. As wheat is the primary food for the majority of the world people, producing wheat grains with high mineral content can ameliorate the problem of mineral hunger. However, the genetic variation available for breeders is limited. The aim of this study was...

Full description

Saved in:
Bibliographic Details
Published in:Plant genetic resources: characterization and utilization 2018-02, Vol.16 (1), p.9-17
Main Authors: Gorafi, Yasir S. A., Ishii, Takayoshi, Kim, June-Sik, Elbashir, Awad Ahmed Elawad, Tsujimoto, Hisashi
Format: Article
Language:English
Subjects:
Atomic beam spectroscopy
Content analysis
Cultivars
Dietary minerals
Emission spectroscopy
Gene mapping
Genetic diversity
Genetic resources
Genotyping
Germplasm
Goat grass
Grain
Heritability
Hunger
Inductively coupled plasma
Iron
Mapping
Markers
Minerals
Nutrition research
Plant breeding
Population
Quantitative trait loci
Spectroscopy
Wheat
Zinc
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:Fe and Zn deficiency are widespread worldwide. As wheat is the primary food for the majority of the world people, producing wheat grains with high mineral content can ameliorate the problem of mineral hunger. However, the genetic variation available for breeders is limited. The aim of this study was to assess the genetic variation in grain Fe and Zn contents in 47 synthetic hexaploid wheats and to identify marker loci associated with Fe and Zn contents. We measured the grain Fe and Zn contents using inductively coupled plasma atomic emission spectroscopy and performed genotyping using SSR markers. The results showed considerable genetic variation for these minerals. We identified three lines with high Fe and Zn contents and six quantitative trait loci of which three were associated with Fe content and the other three with Zn content. The minerals showed positive phenotypic and genotypic correlation and high heritability (>60%). The ratio of the σ 2 g to the σ 2 g×e was ≥1 for the two mineral contents indicating that breeding for increasing mineral content within the synthetic lines is possible. The synthetic wheat lines identified in this study are valuable genetic resources, and can be utilized for breeding wheat cultivars with high mineral content.
ISSN:1479-2621
1479-263X
DOI:10.1017/S1479262116000265