Positive selection along the evolution of primate mitogenomes.

Area of Science:

• Genomics
• Evolutionary Biology
• Primate Phylogenetics

Background:

• Mitochondrial genomes provide insights into evolutionary history.
• Understanding primate mitochondrial DNA evolution is crucial for phylogenetic studies.

Purpose of the Study:

• Sequence and annotate mitochondrial genomes of four neotropical primate species.
• Reconstruct phylogenetic relationships using mitochondrial and nuclear gene data.
• Investigate evidence of positive selection in mitochondrial genes, particularly those involved in the electron transport chain.

Main Methods:

• Mitochondrial genome sequencing and annotation.
• Phylogenetic reconstruction using mitochondrial gene sequences from 66 primate species.
• Screening for positive selection using computational methods.

Main Results:

• Phylogenetic analysis showed congruence between mitochondrial and nuclear gene topologies.
• Fifteen codons across seven mitochondrial genes exhibited evidence of positive selection in nine independent lineages.
• Genes encoding electron transport chain complexes displayed high substitution rates.

Conclusions:

• The study provides valuable genomic data for neotropical primates.
• Mitochondrial gene evolution in primates is influenced by positive selection, especially in electron transport chain complexes.
• Further investigation into nuclear electron transport chain genes is warranted to explore co-evolutionary dynamics.