A Consensus Map for Quality Traits in Durum Wheat Based on Genome-wide Association Studies and Detection of Ortho-meta QTL Across Cereal Species

Overview

Journal Front Genet

Date 2022 Sep 16

PMID 36110219

Authors

Ilaria Marcotuli

Jose Miguel Soriano

Agata Gadaleta

Affiliations

Soon will be listed here.

Abstract

The present work focused on the identification of durum wheat QTL hotspots from a collection of genome-wide association studies, for quality traits, such as grain protein content and composition, yellow color, fiber, grain microelement content (iron, magnesium, potassium, selenium, sulfur, calcium, cadmium), kernel vitreousness, semolina, and dough quality test. For the first time a total of 10 GWAS studies, comprising 395 marker-trait associations (MTA) on 57 quality traits, with more than 1,500 genotypes from 9 association panels, were used to investigate consensus QTL hotspots representative of a wide durum wheat genetic variation. MTA were found distributed on all the A and B genomes chromosomes with minimum number of MTA observed on chromosome 5B (15) and a maximum of 45 on chromosome 7A, with an average of 28 MTA per chromosome. The MTA were equally distributed on A (48%) and B (52%) genomes and allowed the identification of 94 QTL hotspots. Synteny maps for QTL were also performed in , , and , and candidate gene identification allowed the association of genes involved in biological processes playing a major role in the control of quality traits.

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