Journal Article

Mutational Dynamics of Aroid Chloroplast Genomes

Ibrar Ahmed, Patrick J. Biggs, Peter J. Matthews, Lesley J. Collins, Michael D. Hendy and Peter J. Lockhart

in Genome Biology and Evolution

Published on behalf of Society for Molecular Biology and Evolution

Volume 4, issue 12, pages 1316-1323
Published in print January 2012 |
Published online November 2012 | e-ISSN: 1759-6653 | DOI: https://dx.doi.org/10.1093/gbe/evs110

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A characteristic feature of eukaryote and prokaryote genomes is the co-occurrence of nucleotide substitution and insertion/deletion (indel) mutations. Although similar observations have also been made for chloroplast DNA, genome-wide associations have not been reported. We determined the chloroplast genome sequences for two morphotypes of taro (Colocasia esculenta; family Araceae) and compared these with four publicly available aroid chloroplast genomes. Here, we report the extent of genome-wide association between direct and inverted repeats, indels, and substitutions in these aroid chloroplast genomes. We suggest that alternative but not mutually exclusive hypotheses explain the mutational dynamics of chloroplast genome evolution.

Keywords: Araceae; indels; phylogeny; repeats; substitution mutations; taro

Journal Article.  4408 words.  Illustrated.

Subjects: Bioinformatics and Computational Biology ; Evolutionary Biology ; Genetics and Genomics

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