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.1998 Jul 7;95(14):8124-9.
doi: 10.1073/pnas.95.14.8124.

The evolution of primate malaria parasites based on the gene encoding cytochrome b from the linear mitochondrial genome

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The evolution of primate malaria parasites based on the gene encoding cytochrome b from the linear mitochondrial genome

A A Escalante et al. Proc Natl Acad Sci U S A..

Abstract

We report a phylogenetic analysis of primate malaria parasites based on the gene encoding the cytochrome b protein from the mitochondrial genome. We have studied 17 species of Plasmodium, including 14 parasitic in primates. In our analysis, four species were used for rooting the Plasmodium phylogenetic tree: two from closely related genera (Hepatocystis sp. and Haemoproteus columbae) and two other Apicomplexa (Toxoplasma gondii and Theileria parva). We found that primate malaria parasites form a monophyletic group, with the only exception being the Plasmodium falciparum-Plasmodium reichenowi lineage. Phylogenetic analyses that include two species of non-Plasmodium Haemosporina suggest that the genus Plasmodium is polyphyletic. We conclude that the biologic traits, such as periodicity and the capacity to relapse, have limited value for assessing the phylogenetic relationships among Plasmodium species. For instance, we found no evidence that would link virulence with the age of the host-parasite association. Our studies also reveal that the primate malaria parasites originated in Africa, which contradicts the presently held opinion of Southeast Asia as their center of origin. We propose that the radiation of Asian monkey parasites is a recent event where several life history traits, like differences in periodicity, appeared de novo.

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Figures

Figure 1
Figure 1
Phylogenetic relationship among the 17Plasmodium species inferred from the gene encoding cytochromeb. The tree was estimated using the NJ method (25). The GG distance matrix is provided in Table 1. Bootstrap values are provided as percents over 1000 replications. The tree ↑ shows the location of the root as estimated by the DNAMLK algorithm from PHYLIP, which assumes a molecular clock.
Figure 2
Figure 2
Phylogenetic tree of the 17Plasmodium species and the two Haemosporina outgroups. The tree was estimated using the NJ method (25) with the GG distance (26). Bootstrap values are provided as percents over 1000 replications.
Figure 3
Figure 3
Phylogenetic tree of the 19 Haemosporina species usingT. gondii as an outgroup. The tree was estimated using the NJ method (25). The distance matrix was calculated on proteins using the TN distance (32). Bootstrap values are provided as percents over 1000 replications.
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