Extensive Multi-Species Hybridization Between Leuciscidae Minnow Species

Area of Science:

• Ecology
• Evolutionary Biology
• Genetics

Background:

• Anthropogenic disturbances disrupt ecosystems and species population dynamics.
• Interspecific hybridization is common in genetically related species when reproductive barriers are removed.
• The Leuciscidae family is known for its species richness and low reproductive isolation.

Purpose of the Study:

• To assess hybridization outcomes among Leuciscidae minnow species.
• To determine the influence of land use type and environmental variables on hybridization frequency.
• To understand hybridization dynamics in species-rich clades.

Main Methods:

• Genotyping-by-sequencing (GBS) data analysis.
• Assessment of two-species and multi-species hybridization.
• Logistic regression to model the influence of anthropogenic disturbance and environmental factors.

Main Results:

• Hybridization was widespread, found at all 25 sampling sites.
• Hybrids constituted nearly 30% of all sampled individuals.
• Weak relationships were observed between hybridization frequency and environmental factors.

Conclusions:

• Interspecific hybridization is prevalent in the studied Leuciscidae minnow species.
• Anthropogenic disturbances and environmental variables have a limited, yet complex, influence on hybridization.
• Further research is needed to identify key predictors of hybridization in multi-species hybrid zones.