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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Genet. | doi: 10.3389/fgene.2019.01065

Genome-Wide Analysis of Genetic Diversity in Plasmodium falciparum isolates from China-Myanmar border

Run Ye1, Yini Tian1, Yufu Huang1, Yilong Zhang1, Jian Wang1, Xiaodong Sun2,  Hongning Zhou2, Dongmei Zhang1* and  Weiqing Pan1*
  • 1Department of Tropical Diseases, Naval Medical University, China
  • 2Yunnan Institute of Parasitic Diseases, China

Plasmodium falciparum isolates from China-Myanmar border(CMB) have experienced regional special selective pressures and adaptive evolution. However, the genomes of Plasmodium falciparum isolates from this region to date are poorly characterized. Herein, we performed whole-genome sequencing of 34 P. falciparum isolates from CMB and a series of genome-wide sequence analyses to reveal their genetic diversity, population structures and comparisons with the isolates from other epidemic regions (Thai-Cambodia border, Thai-Myanmar border and West Africa). Totally 59,720 high quality SNPs were identified in the P. falciparum isolates from China-Myanmar border, with average nucleotide diversity (π=4.59 x 10-4) and LD decay (132bp). The Tajima’s D and Fu & Li’s D values of the CMB isolates were -0.8 (p<0.05) and -0.84 (p<0.05), respectively, suggesting a demographic history of recent population expansion or purifying selection. Moreover, 78 genes of the parasite were identified that could be under positive selection, including those genes conferring drug resistance such as Pfubp-1. In addition, a 33 SNPs were identified for tracing the source of the parasites with a high accuracy by analysis of the most differential SNPs among the four epidemic regions. Collectively, our data demonstrated high diversity of the CMB isolates’ genomes forming a distinct population and the identification of 33 SNP barcode provides a valuable surveillance of parasite migration among the regions.

Keywords: Plasmodium falciparum, Genomes, China-Myanmar border, diversity, genetic marker

Received: 13 Jun 2019; Accepted: 03 Oct 2019.

Copyright: © 2019 Ye, Tian, Huang, Zhang, Wang, Sun, Zhou, Zhang and Pan. 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.

* Correspondence:
Dr. Dongmei Zhang, Department of Tropical Diseases, Naval Medical University, Shanghai, Shanghai Municipality, China, dmzhangcn@163.com
Dr. Weiqing Pan, Department of Tropical Diseases, Naval Medical University, Shanghai, Shanghai Municipality, China, wqpan0912@aliyun.com