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  11. Polyphyly Of Boehmeria (urticaceae) Congruent With Plastome Structural Variation

Polyphyly of Boehmeria (Urticaceae) congruent with plastome structural variation

Min Zhan1, Ling Xue1, Jian-Jun Zhou2

  • 1College of Forestry, Central South University of Forestry and Technology, Changsha, China.

Frontiers in Plant Science
|August 14, 2024

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View abstract on PubMed

Summary
This summary is machine-generated.

Plastome structural variations, including gene loss and inversions, clarify evolutionary relationships within the challenging Boehmeria genus and its relatives. These variations may also reflect adaptation to diverse habitats.

Area of Science:

  • Plant evolutionary biology
  • Molecular evolution
  • Phylogenomics

Background:

  • The genus *Boehmeria* (Urticaceae) presents taxonomic challenges due to polyphyly and morphological homoplasy.
  • Plastome structural variations are increasingly recognized as valuable markers for resolving evolutionary relationships in plants.

Purpose of the Study:

  • To investigate the utility of plastome structural variations in resolving the phylogeny of *Boehmeria* and allied genera.
  • To reconstruct the evolutionary history of *Boehmeria* s.l. by incorporating new plastome data from related genera.

Main Methods:

  • Phylogenomic analyses were conducted using plastome sequences from *Boehmeria* and related genera, including first-time sampling of *Cypholophus*, *Sarcochlamys*, *Archiboehmeria*, and *Astrothalamus*.
  • Mapping of plastome structural variations, such as gene loss/duplication and inverted repeat (IR) dynamics, onto the phylogenetic tree.
Keywords:
BoehmeriaUrticaceaephylogenetic relationshipplastome

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Main Results:

  • Phylogenomic analyses strongly support *Sarcochlamys* being more closely related to *Leucosyke puya* than to *Boehmeria*.
  • The genus *Boehmeria* s.l. was resolved into four distinct subclades, with early diverging clades showing conserved plastomes and later diverging clades exhibiting greater structural variation.
  • Observed variations include gene loss/duplication, IR contraction/expansion, and inversions, with sizes ranging from 142,627 bp to 170,958 bp.

Conclusions:

  • Plastome structural variations are effective characters for reconstructing the evolutionary history of *Boehmeria* s.l.
  • The observed plastome variations may be associated with the adaptation of *Boehmeria* s.l. to diverse environments, from moist forests to arid deserts.
polyphyly
structural variations