Related Experiment Video
Updated: May 9, 2026

A Nonsequencing Approach for the Rapid Detection of RNA Editing
Published on: April 21, 2022
Comparative analysis of mitochondrial genomes of Iris lactea reveals gene transfer and RNA-editing events
Shuqiong Lu1,2, Chunyu Tian2,3, Yanting Yang2,3
1Pratacultural College, Gansu Agricultural University, Lanzhou, Gansu, China.
Background:
As an important perennial herb in the Iridaceae family, Iris lactea shows strong resistance to saline-alkali, drought, and cold stress, possessing significant ecological, medicinal, and economic value. In this study, we assembled the complete mitochondrial genome of I. lactea using whole-genome sequencing data.
Methods And Results:
The assembled genome was 449,819 bp in length (GenBank Accession: PX667947) with a GC content of 46.97%. We found 113 simple sequence repeats, with tetranucleotide motifs being the most common (56, or 49.56%). The genome contains 600 dispersed repeats, consisting of 288 palindromic and 312 forward sequences. This mitogenome contains 36 protein-coding genes with a combined length of 32,343 bp. Analysis of codon usage revealed a strong preference for arginine, leucine, and serine, whereas methionine and tryptophan were infrequently used. We identified 556 RNA-editing sites, all exhibiting cytosine-to-uracil transitions. Analysis of the sequences inserted into the mitochondrial genome revealed that these chloroplast-derived fragments integrated into non-coding IGS regions and rRNA genes.
Conclusions:
The successful assembly and analysis of the Iris lactea mitogenome significantly enrich the genomic resources of the genus Iris, providing a solid foundation for future research on phylogenetic evolution, germplasm conservation, and genetic improvement of this genus.
Related Concept Videos
Export of Mitochondrial and Chloroplast Genes
RNA Editing
Animal Mitochondrial Genetics
Non-LTR Retrotransposons
Exon Recombination
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Types of Genetic Transfer Between Organisms

