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American Journal of Biochemistry and Molecular Biology
  Year: 2017 | Volume: 7 | Issue: 1 | Page No.: 1-20
DOI: 10.3923/ajbmb.2017.1.20
 
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Evolutionary Lineages in Genus Lethrinus (Family: Lethrinidae) and the Corresponding Trophic Evolution Based on DNA Barcoding

Imam A.A. Mekkawy

Abstract:
Background: The present study aimed at studying the phylogenetic relationships of 18 Lethrinus species and their associated trophic evolution on the basis of their filtered and validated DNA barcoding (cytochrome oxidase subunite I (COI)-sequences) released by the BOLD system database. Materials and Methods: About 98 COI sequences of 18 Lethrinus species were retrieved from BOLD system released nucleotide database and analyzed using different phylogenetic softwares. Results: Intra and inter-specific variations in COI-sequences were recorded with emphasis on geographic variations. Some COI-sequences were postulated to be of misidentified specimens and others were questionable leading to paraphyla. The COI-based phylogenetics using different statistical methods established two lineages in genus Lethrinus with L. haematopterus as ancestor group. These two lineages were corresponding with two obvious trophic types: Low-bodied species with conical lateral teeth and high bodied species with molariform teeth with the sister group L. haematopterus of high-bodied species with conical teeth. Conclusion: These findings emphasizes on the higher validity of DNA barcoding in discovering phylogenetics of genus Lethrinus in comparison to those based on cytochrome b.
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How to cite this article:

Imam A.A. Mekkawy , 2017. Evolutionary Lineages in Genus Lethrinus (Family: Lethrinidae) and the Corresponding Trophic Evolution Based on DNA Barcoding. American Journal of Biochemistry and Molecular Biology, 7: 1-20.

DOI: 10.3923/ajbmb.2017.1.20

URL: https://scialert.net/abstract/?doi=ajbmb.2017.1.20

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