ZW sex chromosome structure in Amborella trichopoda
Sex chromosomes have evolved hundreds of times across the flowering plant tree of life; their recent origins in some members of this clade can shed light on the early consequences of suppressed recombination, a crucial step in sex chromosome evolution. Amborella trichopoda, the sole species of a lineage that is sister to all other extant flowering plants, is dioecious with a young ZW sex determination system. Here we present a haplotype-resolved genome assembly, including highly contiguous assemblies of the Z and W chromosomes. We identify a ~3-megabase sex-determination region (SDR) captured in two strata that includes a ~300-kilobase inversion that is enriched with repetitive sequences and contains a homologue of the Arabidopsis METHYLTHIOADENOSINE NUCLEOSIDASE (MTN1-2) genes, which are known to be involved in fertility. However, the remainder of the SDR does not show patterns typically found in non-recombining SDRs, such as repeat accumulation and gene loss. These findings are consistent with the hypothesis that dioecy is derived in Amborella and the sex chromosome pair has not significantly degenerated.
Authors
- Pamela S. Soltis (ORCID: https://orcid.org/0000-0001-9310-8659)
- Charles P. Scutt (ORCID: https://orcid.org/0000-0003-2970-3810)
- Shanmugam Rajasekar (ORCID: https://orcid.org/0000-0001-9038-5618)
- John T. Lovell (ORCID: https://orcid.org/0000-0002-8938-1166)
- Laramie Aközbek (ORCID: https://orcid.org/0000-0003-3341-3509)
- Sarah B. Carey
- Kerrie Barry (ORCID: https://orcid.org/0000-0002-8999-6785)
- Jayson Talag (ORCID: https://orcid.org/0000-0001-6085-214X)
- Porter P. Lowry (ORCID: https://orcid.org/0000-0002-8047-5019)
- Paul Grabowski (ORCID: https://orcid.org/0000-0002-4372-0847)
- Alan Yocca (ORCID: https://orcid.org/0000-0002-0974-364X)
- Jerry Jenkins (ORCID: https://orcid.org/0000-0002-7943-3997)
- Teresa Jones
- Ada Stewart
- Jérôme Munzinger (ORCID: https://orcid.org/0000-0001-5300-2702)
- Jim Leebens‐Mack (ORCID: https://orcid.org/0000-0003-4811-2231)
- Jane Grimwood (ORCID: https://orcid.org/0000-0002-8356-8325)
- Jeremy Schmutz (ORCID: https://orcid.org/0000-0001-8062-9172)
- Shengqiang Shu (ORCID: https://orcid.org/0000-0002-4336-8994)
- Alex Harkess (ORCID: https://orcid.org/0000-0002-2035-0871)
- Eric B. Knox (ORCID: https://orcid.org/0000-0002-1662-0218)
- Adam Healey (ORCID: https://orcid.org/0000-0002-3088-6856)
- Douglas E. Soltis (ORCID: https://orcid.org/0000-0001-8638-4137)
Institutions
- Université Claude Bernard Lyon 1 (FR)
- École Normale Supérieure de Lyon (FR)
- Centre National de la Recherche Scientifique (FR)
- Centre de Coopération Internationale en Recherche Agronomique pour le Développement (FR)
- Florida Museum of Natural History (US)
- University of Arizona (US)
- Lawrence Berkeley National Laboratory (US)
- École Pratique des Hautes Études (FR)
- University of Georgia (US)
- Joint Genome Institute (US)
- Université de Montpellier (FR)
- Institut Agro Montpellier (FR)
- Missouri Botanical Garden (US)
- University of Florida (US)
- Sorbonne Université (FR)
- Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement (FR)
- Institut de Systématique, Évolution, Biodiversité (FR)
- Indiana University Bloomington (US)
- UMR Botanique et Modélisation de l’Architecture des Plantes et des végétations (FR)
- Laboratoire Reproduction et Développement des Plantes (FR)
- HudsonAlpha Institute for Biotechnology (US)
- Institut de Recherche pour le Développement (FR)
- Auburn University (US)
Publication Details
- Journal
- Nature Plants
- Published
- 2024-11-25
- DOI
- https://doi.org/10.1038/s41477-024-01858-x
- Citations
- 25
- Primary Topic
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Type
- article
- Field-Weighted Citation Impact
- 13.76
Funders
- National Science Foundation
- U.S. Department of Energy
- U.S. Department of Agriculture
- Joint Genome Institute
- National Institute of Food and Agriculture
- Office of Science
- Agricultural Research Service