Abstract
Mitogenomes in plants are well-known as exhibiting high diversity in genome size architecture and repetitive DNA sequences. In this research study, we report on the complete mitochondrial genomes of S. tuberosa and S. mombin using Illumina paired-end and mate-pair end reads. These genomes were obtained by a combination of methods of de novo assembly and contig extension. The mitogenomes of S. tuberosa and S. mombin showed 779,106 bp and 685,788 bp in length, with a total of 35 genes. Genome comparisons showed many rearrangements that were mediated by repetitive DNA, and also high incorporation of DNA from chloroplast. In summary, we demonstrate: (1) first complete mitochondrial genomes for the genus Spondias; (2) the synteny between S. tuberosa and S. mombin showed rearrangements, mediated by repetitive DNA; (3) that gene content in Spondias mitogenomes is highly conserved; and (4) the high incorporation DNA from chloroplast genome, (5) the mitogenome size is due intergenic spacers and (6) the non-tandem repeats contributes for giant intergenic spacers.
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