Genomic evolution and patterns of horizontal gene transfer in Papilio

Area of Science:

• Evolutionary Biology
• Genomics
• Entomology

Background:

• The Papilio genus exhibits significant ecological and phenotypic diversity, making it a key model organism for evolutionary studies.
• Understanding the genomic basis of adaptation and evolutionary relationships in butterflies is crucial for broader evolutionary research.

Purpose of the Study:

• To conduct a comparative genomic analysis of 11 Papilio species.
• To identify species-specific gene family expansions and horizontal gene transfer (HGT) events.
• To investigate the evolutionary patterns of ABC transporter subfamilies and their potential links to environmental adaptation.

Main Methods:

• Comparative genomic analysis of 11 Papilio species genomes.
• Identification and characterization of gene family expansions, including UDP-glucosyltransferase 2.
• Detection and analysis of horizontal gene transfer (HGT) events and donor species.
• Examination of evolutionary patterns in nine ABC transporter subfamilies.

Main Results:

• Discovered species-specific gene family expansions, notably the UDP-glucosyltransferase 2 gene in Papilio polyxenes, linked to insect detoxification.
• Identified 199 horizontally transferred genes acquired from 76 microbial species, with Pseudomonadota and Bacillota being common donors.
• Revealed evolutionary patterns in ABC transporter subfamilies suggesting a correlation with environmental adaptation.

Conclusions:

• The study provides novel insights into the evolutionary relationships and genomic adaptations within the Papilio genus.
• Comparative genomics highlights the role of gene family evolution and HGT in butterfly adaptation.
• Findings contribute valuable data to the ongoing research on butterfly evolutionary biology.