De Novo Assembly of an Allotetraploid Artemisia argyi Genome

Author:

Mei Qiming123,Li Hanxiang12ORCID,Liu Yanbin4,Wu Feng4,Liu Chuang4,Wang Keya12,Liu Hongjun5,Peng Cheng126,Wang Zhengfeng12,Wang Long12,Liu Zhanfeng12ORCID,Yan Junhua12,Zhang Wei12

Affiliation:

1. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China

2. South China National Botanical Garden, Guangzhou 510650, China

3. Guangzhou Linfang Ecological Technology Co., Ltd., Guangzhou 510520, China

4. Tea Bureau of Tongbai County, Nanyang 474750, China

5. People’s Government of Tongbai County, Nanyang 474750, China

6. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

Abstract

The Chinese mugwort (Artemisia argyi Lév. et Vaniot) is an important traditional Chinese medicine plant that is ubiquitously disturbed in Asia. However, the molecular mechanisms that reflect the natural evolution of Artemisia argyi remain unclear. In this study, a high-quality draft assembly of the allotetraploid A. argyi (ArteW1-Tongbai) was conducted utilizing PacBio long-read sequencing and Hi-C technologies. The assembly is about 7.20 Gb with a contig N50 length of 0.87 Mb. The allotetraploid genome of ArteW1-Tongbai is highly heterozygous and rich in repeat sequences (the heterozygous ratio is 1.36%, and the repeat rate is 86.26%). A total of 139,245 protein-coding genes were identified. The KEGG enrichment analysis revealed that 846 species-specific genes were related to the biosynthesis of secondary metabolites. The plants with allopolyploid genomes can potentially exhibit a better adaptive capacity to environmental stresses and accumulation of secondary metabolites. Therefore, the genome assembly serves as a valuable reference for Artemisia, the genus characterized by species richness and diverse specialized metabolites.

Funder

Tongbai County Government, Henan Province of China

the National Natural Science Foundation of China

Publisher

MDPI AG

Subject

Agronomy and Crop Science

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