# The Complete Chloroplast Genome of Tornillo (Cedrelinga cateniformis Ducke 1922, Fabaceae)

## TL;DR

This study sequenced the complete chloroplast genome of Tornillo, a tropical tree, revealing its genetic structure and phylogenetic position within the Fabaceae family.

## Contribution

The first complete chloroplast genome of Cedrelinga cateniformis is sequenced and analyzed, providing insights into its phylogenetic relationships.

## Key findings

- The Tornillo chloroplast genome is 176,700 bp with 138 genes and a classic quadripartite structure.
- The Inverted Repeats are expanded, and the Short Single Copy region is reduced, similar to other Ingeae species.
- Phylogenetic analysis confirms the distinction of the Ingeae tribe from Acacieae and Mimoseae tribes.

## Abstract

Tornillo (Cedrelinga cateniformis Ducke 1922) is a tropical tree of the Fabaceae family. It is commonly used in the lumber factory and is an interesting substitute to overexploited tropical timber species. We sequenced and assembled the first whole chloroplast genome of Tornillo, using Oxford Nanopore technology. The Tornillo's chloroplast is a circular molecule of 176,700 bp with 138 genes and a classic quadripartite structure. The Inverted Repeats present a huge expansion, combined to a strong reduction of the Short Single Copy. Similar results were previously observed in other species of the tribe Ingeae. A maximum likelihood phylogenetic tree reveals a clear distinction of the Ingeae tribe from other tribes (Acacieae and Mimoseae) of the Fabaceae family.

Tornillo (Cedrelinga cateniformis) is a tropical tree from the Fabaceae family, valued as a substitute for overexploited timber species. This study presents the first complete chloroplast genome sequencing of Tornillo, revealing a 176,700 bp structure with 138 genes and confirming its phylogenetic placement within the Ingeae tribe.