The tetraploid Camellia oleifera genome provides insights into evolution, agronomic traits, and genetic architecture of oil Camellia plants
Camellia oleifera is an economically important woody oil plant. Complex ploidy and lack of genomic information have seriously hindered the molecular breeding of C. oleifera. Here, we present an 11.43-Gb haplotype-resolved, chromosome-level genome assembly of tetraploid C. oleifera (COL-tetra). Methods employed in this study support the conclusion that COL-tetra is an autotetraploid and probably originates from genome doubling of the diploid C. brevistyla. In addition, DNA methylation plays a significant role in imbalanced allelic expression and seed development. Genetic divergence analyses reveal significant differentiation signals for flowering time between spring-flowering and autumn-flowering oil Camellia species, which probably account for reproductive isolation between species with distinct flowering times. Strong introgression signals are detected between COL-tetra and C. sasanqua and between C. vietnamensis and COL-hexa, which might affect the development of agronomic traits and environmental adaptability. This study provides valuable insights into the evolution, agronomic trait development, and genetic architecture of oil Camellia plants.
Authors
- Shixin Xiao (ORCID: https://orcid.org/0000-0002-1958-8081)
- Haifeng Wang
- Yekun Yang (ORCID: https://orcid.org/0000-0003-0467-2501)
- Hai Lin
- Xingtan Zhang (ORCID: https://orcid.org/0000-0002-5207-0882)
- A. Zhong (ORCID: https://orcid.org/0000-0002-3137-9987)
- Shi Yan (ORCID: https://orcid.org/0000-0001-8304-8445)
- Guanxing Hu (ORCID: https://orcid.org/0000-0003-1862-6637)
- Zhiqiang Xia (ORCID: https://orcid.org/0000-0002-1555-1337)
- Heping Cao (ORCID: https://orcid.org/0000-0002-0958-1468)
- Deyi Yuan (ORCID: https://orcid.org/0000-0003-4070-366X)
- Wenfang Gong (ORCID: https://orcid.org/0000-0002-9292-7262)
- Shengcheng Zhang (ORCID: https://orcid.org/0000-0002-3949-4269)
- Zhenyang Liao (ORCID: https://orcid.org/0000-0001-8522-9178)
- Lin Zhang (ORCID: https://orcid.org/0000-0001-7465-0282)
- Yanmin Li (ORCID: https://orcid.org/0000-0003-1174-3873)
- Guang Zhao (ORCID: https://orcid.org/0000-0002-0344-0760)
- Ziqi Ye (ORCID: https://orcid.org/0009-0003-6733-2202)
Institutions
- Central South University of Forestry and Technology (CN)
- Agricultural Research Service (US)
- Central South University (CN)
- Guangxi University (CN)
- Hainan University (CN)
- Agricultural Genomics Institute at Shenzhen (CN)
- Southern Regional Research Center (US)
- Chinese Academy of Agricultural Sciences (CN)
- Sansure Biotech (China) (CN)
Publication Details
- Journal
- Cell Reports
- Published
- 2024-10-25
- DOI
- https://doi.org/10.1016/j.celrep.2024.114902
- Citations
- 21
- Primary Topic
- Genetic diversity and population structure
- Type
- article
- Field-Weighted Citation Impact
- 11.56