RT Journal Article
SR Electronic
T1 Comparison among the first representative chloroplast genomes of <em>Orontium, Lasia, Zamioculcas</em>, and <em>Stylochaeton</em> of the plant family Araceae: inverted repeat dynamics are not linked to phylogenetic signaling
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2020.04.07.029389
DO 10.1101/2020.04.07.029389
A1 Abdullah
A1 Claudia L. Henriquez
A1 Furrukh Mehmood
A1 Iram Shahzadi
A1 Zain Ali
A1 Mohammad Tahir Waheed
A1 Thomas B. Croat
A1 Peter Poczai
A1 Ibrar Ahmed
YR 2020
UL http://biorxiv.org/content/early/2020/04/09/2020.04.07.029389.abstract
AB The chloroplast genome provides insight into the evolution of plant species. We de novo assembled and annotated chloroplast genomes of the first representatives of four genera representing three subfamilies: Lasia spinosa (Lasioideae), Stylochaeton bogneri, Zamioculcas zamiifolia (Zamioculcadoideae), and Orontium aquaticum (Orontioideae), and performed comparative genomics using the plastomes. The size of the chloroplast genomes ranged from 163,770–169,982 bp. These genomes comprise 114 unique genes, including 80 protein-coding, 4 rRNA, and 30 tRNA genes. These genomes exhibited high similarities in codon usage, amino acid frequency, RNA editing sites, and microsatellites. The junctions JSB (IRb/SSC) and JSA (SSC/IRa) are highly variable, as is oligonucleotide repeats content among the genomes. The patterns of inverted repeats contraction and expansion were shown to be homoplasious and therefore unsuitable for phylogenetic analyses. Signatures of positive selection were shown for several genes in S. bogneri. This study is a valuable addition to the evolutionary history of chloroplast genome structure in Araceae.Competing Interest StatementThe authors have declared no competing interest.