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Abstract

Three tests of phylogenetic including likelihood-joining tree, neighbour-joining tree, and minimum evolution tree have been used based on sox3 gene. Phylogenetic analysis was used to detect the genetic affinity and common ancestors for selected species that belong to the same or different families. This study showed the most appropriate methods for testing the genetic affinity among species and the methodology of each test according to the requirement of molecular applications. Secondary RNA predicted structure and minimum free energy were also included in this study because of their contribution to the detection of the orthologous gene and variance in RNA folding among species related to the different families. The genetic distance in the studied populations was calculated to know the most appropriate way to find out the genetic similarity among the studied species. The low distance-variance value of each group indicated significant genetic affinity among the species of the same family, this result is more consistent with the test of maximum-likelihood tree indicating the validity of this test to measure the genetic affinity among species that have common ancestors.

Keywords

Fishes Marine Fresh Water Phylogenetic Evolution MFE

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How to Cite
Saud, H. A. ., & Alshami, I. J. J. . (2021). Genetic Variation Among Certain Fish Species in Terms of Evolution and Lineages. Basrah Journal of Agricultural Sciences, 34(2), 147–160. https://doi.org/10.37077/25200860.2021.34.2.12
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