HYBRID EVENT: You can participate in person at Singapore or Virtually from your home or work.
2024 Speakers

Lee Ping Ang

Lee Ping Ang, Speaker at Plant Biotechnology Conferences
Georg August University of Gottingen, Germany
Title : Hybrid capture resolves the phylogeny of the pantropically distributed Zanthoxylum (rutaceae) and reveals an old world origin


With about 225 species, Zanthoxylum L. is the second most species rich genus in Rutaceae. It is the only genus with a pantropical distribution. Economically, it is used in several Asian countries as traditional medicine and spice. In the past Zanthoxylum was divided into two genera, the temperate Zanthoxylum sensu strictu (s.s.) and the (sub)tropical Fagara, due to the large differences in flower morphology: heterochlamydeous in Fagara and homochlamydeous in Zanthoxylum s.s.. This genus is much under studied and previous phylogenetic studies using Sanger sequencing did not resolve the relationships sufficiently. In this study, we use Hybrid Capture with a specially designed bait set for Zanthoxylum to sequence 347 putatively single-copy genes. The taxon sampling has been largely improved as compared to previous studies and I will present preliminary results based on 371 specimens representing 133 species from all continents and major island groups. Our preliminary results reveal similar tree topology as the previous studies while providing more details to the backbone of the phylogeny. The phylogenetic tree consists of four main clades: A) African/Malagasy clade, B) Z. asiaticum clade - a clade consisting widespread species occurring in (sub)tropical Asia and Africa as well as Madagascar, C) Asian/Pacific clade and D) American clade, which also includes the temperate Asian species. The merging of Fagara and Zanthoxylum is supported by our results and the homochlamydeous flowers of Zanthoxylum s.s. are likely derived from heterochlamydeous flowers. Several of the morphologically defined sections within Zanthoxylum are not monophyletic. In this presentation, I will (1) introduce the framework of this project; (2) present preliminary results and (3) the ongoing progress of the study.


Miss Lee Ping Ang embarked on her academic journey in the field of biology, earning her Bachelor's degree in Conservation Biology from the University Malaysia Sabah. Fueled by a passion for plant sciences, she pursued a Master's degree in Botany at East China Normal University. Her commitment to advancing her knowledge led her to the University of Goettingen, where she now pursues her Ph.D. in Systematics Botany. As a Ph.D. candidate, her research focused on the evolution of polyploidy and apomixes in the pantropically distributed and species-rich genus Zanthoxylum.

Signup for updates

By submitting this form, you are consenting to receive emails and notifications from Magnus Group. You can revoke your consent to receive emails at any time by using the Safe Unsubscribe link, found at the bottom of every email