Agriculture

Genomic analyses provide insights into spinach domestication and the genetic basis of agronomic traits

X. Cai, X. Sun, et al.

This groundbreaking study by Xiaofeng Cai and colleagues presents a chromosome-scale reference genome assembly of spinach, highlighting significant genome rearrangements and the effects of artificial selection on leaf traits, bolting, and flowering. Insights into genetic diversity and candidate genes for agronomic traits offer valuable resources for spinach breeding.

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Abstract

This study reports a high-quality chromosome-scale reference genome assembly of spinach and genome resequencing of 305 cultivated and wild spinach accessions. Analysis reveals substantial genome rearrangements after divergence from ancestral Chenopodiaceae, linked to high repeat content. Population genomic analyses illuminate genetic diversity and differentiation. Genome-wide association studies (GWAS) identify regions and candidate genes for 20 agronomic traits. Domestication sweeps associated with leaf phenotype, bolting, and flowering demonstrate artificial selection's role in spinach evolution. This research provides insights into spinach evolution and domestication, and valuable resources for breeding.

Publisher

Nature Communications

Published On

Dec 13, 2021

Authors

Xiaofeng Cai, Xuepeng Sun, Chenxi Xu, Honghe Sun, Xiaoli Wang, Chenhui Ge, Zhonghua Zhang, Quanxi Wang, Zhangjun Fei, Chen Jiao, Quanhua Wang

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