Pollination Mode and Mating System Explain Patterns in Genetic Differentiation in Neotropical Plants

Area of Science:

• Ecology
• Evolutionary Biology
• Genetics

Background:

• Neotropical plants exhibit diverse life history traits (LHTs) and ecological attributes.
• Understanding how these factors influence genetic diversity and differentiation is key to Neotropical plant evolution.

Purpose of the Study:

• To investigate the effects of LHTs and ecological factors on genetic diversity and differentiation in Neotropical plants.
• To assess the influence of phylogenetic non-independence on these relationships.

Main Methods:

• Conducted an exhaustive literature survey of genetic studies on Neotropical plants.
• Employed generalized linear mixed models (GLMMs) to analyze LHTs and genetic patterns.
• Utilized phylogenetic generalized least squares (pGLS) to account for phylogenetic effects.

Main Results:

• GLMMs revealed numerous significant relationships between LHTs and genetic patterns.
• After accounting for phylogeny (pGLS), population differentiation (FST) was linked to pollination, mating system, and habitat.
• Outcrossing mating systems were associated with lower FST; allelic richness (AR) related to pollination and range; heterozygosity (HeS) linked to habitat.

Conclusions:

• Phylogenetic non-independence can alter observed relationships between LHTs and genetic patterns.
• LHTs and ecological factors substantially shape genetic patterns in Neotropical plants.
• These factors likely drive key evolutionary processes in plant populations.