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Related Experiment Videos

Mating system shifts a species' range.

Xin-Sheng Hu1,2, Xin-Xin Zhang1,2, Wei Zhou1,2

  • 1Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, South China Agricultural University, Guangdong, 510642, China.

Evolution; International Journal of Organic Evolution
|December 29, 2018
PubMed
Summary
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Mating systems influence plant species

Area of Science:

  • Evolutionary biology
  • Plant ecology
  • Population genetics

Background:

  • Species' geographic ranges are shaped by ecological and evolutionary factors.
  • Mating systems are known predictors of plant species' ranges, but underlying mechanisms are unclear.

Purpose of the Study:

  • To develop a theoretical model explaining how mating systems influence plant species' ranges.
  • To investigate the role of migration-selection processes in range determination.

Main Methods:

  • Theoretical modeling incorporating alternation of generations (gametophyte and sporophyte).
  • Modeling gene flow via haploid pollen and diploid seed dispersal.
  • Analysis of selfing rates and gametophytic selection under random and nonrandom mating.
Keywords:
Alternation of generationsgene flowmating systemselectionspecies’ range

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Main Results:

  • Selfing restricts ranges under gametophytic selection but expands them without it.
  • Gametophytic selection slightly restricts ranges in random mating systems.
  • Demographic models (logarithmic and logistic) confirm conclusions.

Conclusions:

  • The interplay between selfing and gametophytic selection is key to mating system's role in range formation.
  • This model explains range size variation in native, naturalized, and invasive plants.