AI Article Synopsis
- Anastrepha obliqua, the West Indian fruit fly, is a major agricultural pest affecting over 60 plant species across a range from northern Mexico to southern Brazil, including the Caribbean.
- Molecular analysis of mitochondrial DNA from 153 specimens in various Brazilian biomes revealed weak genetic structure among the populations, suggesting a close genetic relationship with previously studied Caribbean populations.
- The study proposes a historical migration pattern from west to east in Brazil, explaining the high genetic diversity in the Amazon Forest compared to lower diversity in other regions.
Article Abstract
Anastrepha obliqua (Macquart), the West Indian fruit fly, is one of the most economically important pest species in the Neotropical region. It infests an extensive range of host plants that include over 60 species. The geographic range of A. obliqua is from northern Mexico to southern Brazil and includes the Caribbean Islands. Previous molecular studies have revealed significant genetic structure among populations. We used sequences from a fragment of the mitochondrial protein-coding gene cytochrome c oxidase I to estimate structure and genetic diversity of A. obliqua populations from Brazil. We analyzed a total of 153 specimens from the Amazon Forest, Atlantic Forest, Cerrado, and Caatinga biomes. Our study revealed weak genetic structure among the A. obliqua Brazilian populations sampled. Collections from the Amazon Forest had similar haplotype diversity compared to previously reported estimates for collections from the Caribbean and both populations are also closely related to each other, thus challenging the hypothesis that A. obliqua originated in the Caribbean and then moved to other regions of the Americas. Therefore, further evidence is necessary to draw a definite conclusion about the putative center of origin for A. obliqua. Additionally, we suggest a putative historical migration from the west to the east for the A. obliqua Brazilian populations, which could explain the high genetic diversity for this fly in the Amazon Forest and low genetic diversity in the other Brazilian biomes.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6301665 | PMC |
| http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0208997 | PLOS |
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