Genome-wide association study reveals the genetic architecture of seed vigor in oats
Journal
G3: Genes, Genomes, Genetics
Journal Volume
10
Journal Issue
12
Pages
4489-4503
Date Issued
2020
Author(s)
Abstract
Seed vigor is crucial for crop early establishment in the field and is particularly important for forage crop production. Oat (Avena sativa L.) is a nutritious food crop and also a valuable forage crop. However, little is known about the genetics of seed vigor in oats. To investigate seed vigor-related traits and their genetic architecture in oats, we developed an easy-to-implement image-based phenotyping pipeline and applied it to 650 elite oat lines from the Collaborative Oat Research Enterprise (CORE). Root number, root surface area, and shoot length were measured in two replicates. Variables such as growth rate were derived. Using a genome-wide association (GWA) approach, we identified 34 and 16 unique loci associated with root traits and shoot traits, respectively, which corresponded to 41 and 16 unique SNPs at a false discovery rate, 0.1. Nine root-associated loci were organized into four sets of homeologous regions, while nine shoot-associated loci were organized into three sets of homeologous regions. The context sequences of five trait-associated markers matched to the sequences of rice, Brachypodium and maize (E-value, 10210), including three markers matched to known gene models with potential involvement in seed vigor. These were a glucuronosyltransferase, a mitochondrial carrier protein domain containing protein, and an iron-sulfur cluster protein. This study presents the first GWA study on oat seed vigor and data of this study can provide guidelines and foundation for further investigations. Copyright ? 2020 Huang et al.
Subjects
glucuronosyltransferase; iron sulfur protein; Article; Brachypodium; crop; gene cluster; gene locus; gene sequence; genetic trait; genome-wide association study; growth rate; maize; nonhuman; oat; phenotypic variation; plant seed; seed vigor; shoot length; single nucleotide polymorphism; surface area; tropics
Type
journal article