Genome Resequencing Reveals Independent Domestication and Breeding Improvement of Naked Oat

Overview

Journal Gigascience

Publisher Oxford University Press

Specialties Biology
Genetics

Date 2023 Jul 31

PMID 37524540

Authors

Jinsheng Nan

Yu Ling

Jianghong An

Ting Wang

Mingna Chai

Jun Fu

Gaochao Wang

Cai Yang

Yan Yang

Bing Han

Affiliations

Soon will be listed here.

Abstract

As an important cereal crop, common oat, has attracted more and more attention due to its healthy nutritional components and bioactive compounds. Here, high-depth resequencing of 115 oat accessions and closely related hexaploid species worldwide was performed. Based on genetic diversity and linkage disequilibrium analysis, it was found that hulled oat (Avena sativa) experienced a more severe bottleneck than naked oat (Avena sativa var. nuda). Combined with the divergence time of ∼51,200 years ago, the previous speculation that naked oat was a variant of hulled oat was rejected. It was found that the common segments that hulled oat introgressed to naked oat cultivars contained 444 genes, mainly enriched in photosynthetic efficiency-related pathways. Selective sweeps during environmental adaptation and breeding improvement were identified in the naked oat genome. Candidate genes associated with smut resistance and the days to maturity phenotype were also identified. Our study provides genomic resources and new insights into naked oat domestication and breeding.

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