AI Article Synopsis
- Research on sex determination in dioecious plants, particularly Amborella trichopoda, is gaining traction due to advances in genome sequencing.
- Amborella serves as a key model for studying flower evolution, even though the exact mechanisms of sex determination in the species are still unknown.
- Recent findings suggest that Amborella has a ZW sex determination system, with a limited number of specific genes, and that its sex chromosomes evolved less than 16.5 million years ago, indicating a relatively recent development in relation to other flowering plants.
Article Abstract
The genetic basis and evolution of sex determination in dioecious plants is emerging as an active area of research with exciting advances in genome sequencing and analysis technologies. As the sole species within the sister lineage to all other extant flowering plants, Amborella trichopoda is an important model for understanding the evolution and development of flowers. Plants typically produce only male or female flowers, but sex determination mechanisms are unknown for the species. Sequence data derived from plants of natural origin and an F1 mapping population were used to identify sex-linked genes and the nonrecombining region. Amborella trichopoda has a ZW sex determination system. Analysis of genes in a 4 Mb nonrecombining sex-determination region reveals recent divergence of Z and W gametologs, and few Z- and W-specific genes. The sex chromosomes of A. trichopoda evolved less than 16.5 Myr ago, long after the divergence of the extant angiosperms.
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| http://dx.doi.org/10.1111/nph.17662 | DOI Listing |
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