中文 Contact
  • About CAAS
    Introduction
    Mission & Vision
    Leadership
    CAAS In Numbers
    Organization
  • Newsroom
    Focus News
    Latest News
    Research Updates
    Bulletins
  • Research & Innovation
    Major Achievements
    Research Areas
    Facilities
    ASTIP
    Innovation Teams
  • International Cooperation
    Partners
    Platforms
    Initiatives
  • Join Us
    Talent Recruitment
    Career Opportunities
    Postgraduate Education
  • Media
    Annual Report
    Video
    CAAS in Media
    Journal
Back CAAS 中文 Contact
  • About CAAS
    Introduction
    Mission & Vision
    Leadership
    CAAS In Numbers
    Organization
  • Newsroom
    Focus News
    Latest News
    Research Updates
    Bulletins
  • Research & Innovation
    Major Achievements
    Research Areas
    Facilities
    ASTIP
    Innovation Teams
  • International Cooperation
    Partners
    Platforms
    Initiatives
  • Join Us
    Talent Recruitment
    Career Opportunities
    Postgraduate Education
  • Media
    Annual Report
    Video
    CAAS in Media
    Journal

Newsroom

Home- Newsroom- Research Updates
Home- Newsroom- Research Updates
分享到

Collaboration between the Institute of Vegetables and Flowers, CAAS, and Wageningen University Unveils the Key Role of Homoeologous Exchange in the Domestication of Allopolyploid Brassica Vegetables

小 中 大
Source : Institute of Vegetables and Flowers

Recently, the Molecular Design Breeding team at the Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences (CAAS), in collaboration with the Plant Breeding group at Wageningen University, published a research paper titled "Contribution of homoeologous exchange to domestication of polyploid Brassica" in Genome Biology . This study systematically reveals for the first time the critical role of Homoeologous Exchange (HE) in the domestication of allopolyploid Brassica vegetables.

Polyploidization is a significant driving force in plant evolution, particularly playing a key role in species diversification and domestication of Brassica vegetables (such as rapeseed and mustard). In allopolyploids, homoeologous exchange (HE) between different subgenomes can lead to genome structural changes, resulting in gene expression and phenotypic diversity. However, the specific mechanisms of HE in plant adaptation and domestication remain unclear.

1.jpg

Figure 1. HE Characterization Map of B. napus Population

This study analyzed whole-genome resequencing data from various morphotypes and ecotypes of the allopolyploid Brassica napus to investigate the role of homoeologous exchange (HE) in its domestication. The results revealed that HE events are widespread across different B. napus populations and individuals and continue to occur during the recent domestication of B. napus (Figure 1). Further analysis showed that HE events not only altered the genome structure but were also associated with trait diversity in different morphotypes and ecotypes, potentially aiding adaptation to various environments and domestication demands (Figure 2).

In particular, the study focused on Swede (rutabaga), assembling a new reference genome and identifying significant HE signals. Swede's genome shows substantial A genome segments replacing C genome segments, suggesting that these A genome segments may have played a crucial role in root enlargement during domestication. Additionally, HE events affected genes involved in flowering time regulation and root development, indicating that HE-modified genomic regions contributed to both nutritional growth and root formation in Swede.

These findings offer new insights into the domestication and trait formation of different B. napus groups, with potential applications for future breeding efforts. Moreover, HE was also observed in another allopolyploid species, B. juncea, where significant selection for HE events was detected, suggesting the broad evolutionary and adaptive significance of HE in polyploid crop domestication.

配图原图2.jpg

Figure 2. Selection signals for homoeologous exchange (HE) in major B. napus groups.

Tianpeng Wang, a joint Ph.D. student from the Vegetable Molecular Design Breeding Team at the Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, and the Plant Breeding Group at Wageningen University, is the first author of this paper. The study was co-authored by Researcher Xiaowu Wang and Professor Guusje Bonnema as corresponding authors, with contributions from Master's student Ranze Zhao and Professor Aalt D. J. van Dijk from Wageningen University's Bioinformatics Department. The research was supported by the National Key R&D Program (2021YFF1000104), the National Natural Science Foundation of China, the Science and Technology Innovation Project of the Chinese Academy of Agricultural Sciences, the National Key Laboratory of Vegetable Biotechnology Breeding, the Dutch TKI project, and the China Scholarship Council.

Link by https://genomebiology.biomedcentral.com/articles/10.1186/s13059-024-03370-z.

By Xu Cai(caixu@caas.cn)

Latest News
  • Nov 21, 2024
    IPPCAAS Successfully Organized the FAO-CAAS Technical Workshop on Sustainable Fall Armyworm Management for Africa in Guangdong
  • Nov 07, 2024
    The Policy and Technology Exchange Meeting of Deepening Environmental Cooperation on Dust and Sand Storm Control in Northeast Asia for Green and Sustainable Development co-organized by Institute of Grassland Research, CAAS successfully held in Hohhot
  • Nov 07, 2024
    IAED-CAAS delegation visits four Central-Asian countries for scientific cooperation
  • Nov 06, 2024
    Experts from ICS Participated in the 3rd IWC
  • Oct 24, 2024
    Prof. Luxiang Liu Renewed His Term as the Chairman of the Mutation Breeding Network (MBN)
  • About CAAS
    Introduction
    Mission & Vision
    Leadership
    CAAS In Numbers
    Organization
  • Newsroom
    Focus News
    Latest News
    Research Updates
    Bulletins
  • Research & Innovation
    Major Achievements
    Research Areas
    Facilities
    ASTIP
    Innovation Teams
  • International Cooperation
    Partners
    Platforms
    Initiatives
  • Join Us
    Talent Recruitment
    Career Opportunities
    Postgraduate Education
  • Media
    Annual Report
    Video
    CAAS in Media
    Journal

Links

Ministry of Agriculture and Rural Affairs of the People's Republic of China
Giving to CAAS

CAAS

Copyright © 2023 Chinese Academy of Agricultural Sciences京ICP备10039560号-5 京公网安备11940846021-00001号

No.12 Zhongguancun South Street, Haidian District, Beijing, P.R.China

www.caas.cn/en/

diccaas@caas.cn

Top