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. 2022 Jul 4;13:899252. doi: 10.3389/fpls.2022.899252

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Copyright © 2022 Wang, Gao, Chao, Li, Pu, Wang and Chen.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Comparison of sample sequence repeats (SSR) and repeats among 24 chloroplast genomes of Nicotiana. (A) The number of SSRs among Nicotiana species. Each color represented the number of SSR belonging to a specific type, as provided. (B) The percentage of SSR number located in different chloroplast regions (LSC: large single-copy, SSC: Small single-copy, IR: inverted repeat region including IRa and IRb) of Nicotiana species. (C) The percentage of SSR number on CDS and intergenic regions of Nicotiana chloroplast genomes. (D) The size distribution of palindromic, forward and tandem repeats among the chloroplast genomes. (E) The number of repeats among the different regions (LSC, SSC, and IRs) of chloroplast genomes. (F) The number of repeats among the CDS and intergenic regions of chloroplast genomes.