Dataset Information

Complete mitochondrial genome of Saiga tatarica (Ruminantia; Pecora; Bovidae) isolate Wuwei in China.

ABSTRACT: This report described the complete mitochondrial genome of the Saiga antelope, Saiga tatarica, from the Gansu Endangered Animal Research Center (GEARC) in Gansu Province, China. The mitogenome was a circular molecule of 16,376?bps (Genbank accession number: MF497028). It contained 13 protein-coding, 22 tRNA and two rDNA genes. The protein-coding genes had ATA or ATG as the initiation codon, and were terminated by the typical stop codon TAA, except for NAD2 and NAD3. The complete mitogenome sequence would be useful for further understanding origination, evolution and conservation genetics of S. tatarica population in China.

SUBMITTER: Ding X

PROVIDER: S-EPMC7800055 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Complete mitochondrial genome of <i>Saiga tatarica</i> (Ruminantia; Pecora; Bovidae) isolate Wuwei in China.

Ding Xin X Wu Jin J Xiao Hui H Wang Zhaojun Z Liu Qi Q Liu Xuedong X Jin Kun K Zheng Dong D

Mitochondrial DNA. Part B, Resources 20170926 2

This report described the complete mitochondrial genome of the Saiga antelope, <i>Saiga tatarica</i>, from the Gansu Endangered Animal Research Center (GEARC) in Gansu Province, China. The mitogenome was a circular molecule of 16,376 bps (Genbank accession number: MF497028). It contained 13 protein-coding, 22 tRNA and two rDNA genes. The protein-coding genes had ATA or ATG as the initiation codon, and were terminated by the typical stop codon TAA, except for NAD2 and NAD3. The complete mitogenom ...[more]

PMID: 33473945

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Project description:BackgroundMolecular phylogenetics has provided unprecedented resolution in the ruminant evolutionary tree. However, molecular age estimates using only one or a few (often misapplied) fossil calibration points have produced a diversity of conflicting ages for important evolutionary events within this clade. I here identify 16 fossil calibration points of relevance to the phylogeny of Bovidae and Ruminantia and use these, individually and together, to construct a dated molecular phylogeny through a reanalysis of the full mitochondrial genome of over 100 ruminant species.ResultsThe new multi-calibrated tree provides ages that are younger overall than found in previous studies. Among these are young ages for the origin of crown Ruminantia (39.3-28.8 Ma), and crown Bovidae (17.3-15.1 Ma). These are argued to be reasonable hypotheses given that many basal fossils assigned to these taxa may in fact lie on the stem groups leading to the crown clades, thus inflating previous age estimates. Areas of conflict between molecular and fossil dates do persist, however, especially with regard to the base of the rapid Pecoran radiation and the sister relationship of Moschidae to Bovidae. Results of the single-calibrated analyses also show that a very wide range of molecular age estimates are obtainable using different calibration points, and that the choice of calibration point can influence the topology of the resulting tree. Compared to the single-calibrated trees, the multi-calibrated tree exhibits smaller variance in estimated ages and better reflects the fossil record.ConclusionsThe use of a large number of vetted fossil calibration points with soft bounds is promoted as a better approach than using just one or a few calibrations, or relying on internal-congruency metrics to discard good fossil data. This study also highlights the importance of considering morphological and ecological characteristics of clades when delimiting higher taxa. I also illustrate how phylogeographic and paleoenvironmental hypotheses inferred from a tree containing only extant taxa can be problematic without consideration of the fossil record. Incorporating the fossil record of Ruminantia is a necessary step for future analyses aiming to reconstruct the evolutionary history of this clade.

Dataset Information

Complete mitochondrial genome of Saiga tatarica (Ruminantia; Pecora; Bovidae) isolate Wuwei in China.

Publications

Complete mitochondrial genome of <i>Saiga tatarica</i> (Ruminantia; Pecora; Bovidae) isolate Wuwei in China.

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