Comparative Mitogenomic Analysis Provides Evolutionary Insights into Formica (Hymenoptera: Formicidae)

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2024 Jun 10

PMID 38857223

Authors

Min Liu

Shi-Yun Hu

Min Li

Hao Sun

Ming-Long Yuan

Affiliations

Soon will be listed here.

Abstract

Formica is a large genus in the family Formicidae with high diversity in its distribution, morphology, and physiology. To better understand evolutionary characteristics of Formica, the complete mitochondrial genomes (mitogenomes) of two Formica species were determined and a comparative mitogenomic analysis for this genus was performed. The two newly sequenced Formica mitogenomes each included 37 typical mitochondrial genes and a large non-coding region (putative control region), as observed in other Formica mitogenomes. Base composition, gene order, codon usage, and tRNA secondary structure were well conserved among Formica species, whereas diversity in sequence size and structural characteristics was observed in control regions. We also observed several conserved motifs in the intergenic spacer regions. These conserved genomic features may be related to mitochondrial function and their highly conserved physiological constraints, while the diversity of the control regions may be associated with adaptive evolution among heterogenous habitats. A negative AT-skew value on the majority chain was presented in each of Formica mitogenomes, indicating a reversal of strand asymmetry in base composition. Strong codon usage bias was observed in Formica mitogenomes, which was predominantly determined by nucleotide composition. All 13 mitochondrial protein-coding genes of Formica species exhibited molecular signatures of purifying selection, as indicated by the ratio of non-synonymous substitutions to synonymous substitutions being less than 1 for each protein-coding gene. Phylogenetic analyses based on mitogenomic data obtained fairly consistent phylogenetic relationships, except for two Formica species that had unstable phylogenetic positions, indicating mitogenomic data are useful for constructing phylogenies of ants. Beyond characterizing two additional Formica mitogenomes, this study also provided some key evolutionary insights into Formica.

Citing Articles

A Comparative Analysis of Mitogenomes in Species of the Complex and Other Species of the Genus (Formicidae, Dolichoderinae).

Ruiz-Mena A, Mora P, Rico-Porras J, Kaufmann B, Seifert B, Palomeque T Insects. 2025; 15(12.

PMID: 39769559 PMC: 11677639. DOI: 10.3390/insects15120957.

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