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Shuai Tan

Bio: Shuai Tan is an academic researcher from Sichuan University. The author has contributed to research in topics: Pseudois nayaur & Pseudois. The author has an hindex of 5, co-authored 10 publications receiving 73 citations.

Papers
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Journal ArticleDOI
25 May 2013-Gene
TL;DR: The results suggested that Tibetan argali and Gansu argali may belong to the same subspecies (O. hodgsoni) of O. ammon, rather than two different subspecies.

22 citations

Journal ArticleDOI
Quekun Peng1, Lei Tang1, Shuai Tan1, Zhigang Li, Jifei Wang, Fangdong Zou1 
TL;DR: It is hypothesized that the large body size and diverse feeding styles are factors influencing the nonsynonymous substitutions in the ATP synthase complex of blue sheep.

18 citations

Journal ArticleDOI
21 Jul 2012-Genetica
TL;DR: It is indicated that western Sichuan was a potential refugium for blue sheep during the Quaternary period and the Helan Mountain population showed distinct genetic characteristics from other geographic populations, and thus should be classified as a new subspecies.
Abstract: Blue sheep (Pseudois nayaur), a Central Asian ungulate with restricted geographic distribution, exhibits unclear variation in morphology and phylogeographic structure. The composition of species and subspecies in the genus Pseudois is controversial, particularly with respect to the taxonomic designation of geographically restricted populations. Here, 26 specimens including 5 dwarf blue sheep (Pseudois schaeferi), which were collected from a broad geographic region in China, were analyzed for 2 mitochondrial DNA fragments (cytochrome b and control region sequences). In a pattern consistent with geographically defined subspecies, we found three deeply divergent mitochondrial lineages restricted to different geographic regions. The currently designated two subspecies of blue sheep, Pseudois nayaur nayaur and Pseudois nayaur szechuanensis, were recognized in the phylogenetic trees. In addition, the Helan Mountain population showed distinct genetic characteristics from other geographic populations, and thus should be classified as a new subspecies. In contrast, dwarf blue sheep clustered closely with some blue sheep from Sichuan Province in the phylogenetic trees. Therefore, dwarf blue sheep appear to be a subset of Pseudois nayaur szechuanensis. After considering both population genetic information and molecular clock analysis, we obtained some relevant molecular phylogeographic information concerning the historical biogeography of blue sheep. These results also indicate that western Sichuan was a potential refugium for blue sheep during the Quaternary period.

17 citations

Journal ArticleDOI
TL;DR: Although the results raise doubt about the present recognized distribution range of blue sheep, they have corroborated the validity of the identified subspecies in genus Pseudois and shown that vicariance plays an important role in diversification within this genus.
Abstract: Blue sheep, Pseudois nayaur, is endemic to the Tibetan Plateau and the surrounding mountains, which are the highest-elevation areas in the world. Classical morphological taxonomy suggests that there are two subspecies in genus Pseudois (Bovidae, Artiodactyla), namely Pseudois nayaur nayaur and Pseudois nayaur szechuanensis. However, the validity and geographic characteristics of these subspecies have never been carefully discussed and analyzed. This may be partially because previous studies have mainly focused on the vague taxonomic status of Pseudois schaeferi (dwarf blue sheep). Thus, there is an urgent need to investigate the evolutionary relationship and taxonomy system of this genus. This study enriches a previous dataset by providing a large number of new samples, based on a total of 225 samples covering almost the entire distribution of blue sheep. Molecular data from cytochrome b and the mitochondrial control region sequences were used to reconstruct the phylogeny of this species. The phylogenetic inferences show that vicariance plays an important role in diversification within this genus. In terms of molecular dating results and biogeographic analyses, the striking biogeographic pattern coincides significantly with major geophysical events. Although the results raise doubt about the present recognized distribution range of blue sheep, they have corroborated the validity of the identified subspecies in genus Pseudois. Meanwhile, these results demonstrate that the two geographically distinct populations, the Helan Mountains and Pamir Plateau populations, have been significantly differentiated from the identified subspecies, a finding that challenges the conventional taxonomy of blue sheep.

8 citations

Journal ArticleDOI
Quekun Peng1, Gaochao Wang1, Shuai Tan1, Tao Wang1, Li Li, Fangdong Zou1 
TL;DR: Thirteen tetranucleotide microsatellite loci were isolated from tetran nucleotidemicrosatellite enriched libraries for the Tokay gecko to facilitate the population genetic analyses of this species and to enable estimates of gene flow between the two types of the Tokays.
Abstract: Thirteen tetranucleotide microsatellite loci were isolated from tetranucleotide microsatellite enriched libraries for the Tokay gecko (gekko gecko). The species is endemic to Southeast Asia, known to be a habitat specialist, and exposed to severe hunting pressures in the mountainous areas of Southeast Asia. These highly polymorphic markers (6–25 alleles) will facilitate the population genetic analyses of this species. In particular, they will enable estimates of gene flow between the two types of the Tokay gecko: the black-spotted Tokay gecko and the red-spotted Tokay gecko-a critical element in assessing classification between the two.

5 citations


Cited by
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Journal Article
Fumio Tajima1
30 Oct 1989-Genomics
TL;DR: It is suggested that the natural selection against large insertion/deletion is so weak that a large amount of variation is maintained in a population.

11,521 citations

Journal ArticleDOI
Bo Zhang1, Yan Hong Zhang1, Xin Wang1, Hui Xian Zhang1, Qiang Lin1 
TL;DR: The mitogenome of a deep‐sea sea anemone was sequenced and characterized and it was deduced that these novel gene features may influence the activity of mitochondria, one of the most important organelles on earth.
Abstract: The deep sea is one of the most extensive ecosystems on earth Organisms living there survive in an extremely harsh environment, and their mitochondrial energy metabolism might be a result of evolution As one of the most important organelles, mitochondria generate energy through energy metabolism and play an important role in almost all biological activities In this study, the mitogenome of a deep-sea sea anemone (Bolocera sp) was sequenced and characterized Like other metazoans, it contained 13 energy pathway protein-coding genes and two ribosomal RNAs However, it also exhibited some unique features: just two transfer RNA genes, two group I introns, two transposon-like noncanonical open reading frames (ORFs), and a control region-like (CR-like) element All of the mitochondrial genes were coded by the same strand (the H-strand) The genetic order and orientation were identical to those of most sequenced actiniarians Phylogenetic analyses showed that this species was closely related to Bolocera tuediae Positive selection analysis showed that three residues (31 L and 42 N in ATP6, 570 S in ND5) of Bolocera sp were positively selected sites By comparing these features with those of shallow sea anemone species, we deduced that these novel gene features may influence the activity of mitochondrial genes This study may provide some clues regarding the adaptation of Bolocera sp to the deep-sea environment

38 citations

Journal Article
TL;DR: For instance, the authors argues that Chinese wildlife management suffers from an inability to value wildlife for its own sake, more than from habitat destruction, which leads to the failure to manage the relationship between consumption and production/harvest and protection of wildlife resources.
Abstract: Wildlife Conservation in China: Preserving the Habitat of China's Wild West, by Richard B. Harris. Armonk: M. E. Sharpe, 2008. xxiv + 341 pp. US$74.95 (hardcover). The book is based on 4 years of fieldwork in western China by a western wildlife biologist over a period of 20 years. The title is self-explanatory, and the matters discussed range from biological and geographical topics to politico-economic issues of wildlife conservation. The Preface and Chapter 1 argue that Chinese wildlife management suffers from an inability to value wildlife for its own sake, more than from habitat destruction. The failure to value wildlife presumably leads to the failure to manage the relationship between consumption and production/harvest and protection of wildlife resources. In Chapter 2, Harris examines geographical factors such as aridity, remoteness and the sparseness of human population of China's west. He examines ethnicity and culture, then jumps to the question of whether western China is getting drier. He follows with a section on the land tenure system of grasslands, and highlights the Chinese penchant for "scientific" fixes such as the privatization of pastoral lands. Chapter 3 presents the argument that Chinese views on wildlife are utilitarian: the Chinese value wildlife only to the extent that it is of use to humankind, rather than valuing wildlife for its own sake. When conservation initiatives are finally taken, they are couched in terms that deny any conflict between the interests of nature and the requirements of civilized humanity. Such "Confucian optimism", he argues, is paradoxically counterproductive to the aims of conservation. Chapter 4 shows that most demands for wildlife resources in China are fulfilled by captive breeding, and asks whether such breeding has any discernible negative effects on wildlife populations. The conclusion is that there is insufficient data either way. Chapter 5 is the best argued and most coherent section of the book, and looks at the legal institutions behind the protection of wildlife, in particular the 1988 Wildlife Protection Law. Here Harris highlights a tendency in Chinese legislation to issue draconian and overly-simplistic laws which are too difficult to implement. Quoting Peter Ho, William Alford and Shen Yuanyuan, he states that, because the law is so strict, it only expresses an ideal, rather than reflecting the realities of enforcement. Chapter 6 also looks at one institutional arrangement for the protection of wildlife habitat: nature reserves. As with the 1998 Wildlife Protection Law, the gap between the stated ideal of nature reserves and their reality is evident. Once again, he sees the Chinese government's penchant for simplistic solutions, such as equating the designation of nature reserves with conservation (p. 119), as counterproductive. He argues, correctly, that quick legislative fixes and the bare designation of reserves do nothing for real conservation. …

29 citations

Journal ArticleDOI
21 Aug 2015-PLOS ONE
TL;DR: The complete mitochondrial sequences of two species of accipitrid birds, namely Aquila fasciata and Buteo lagopus, are determined and phylogenetic analyses indicate that the subfamily Aquilinae and all currently polytypic genera of this subfamily are monophyletic.
Abstract: The family Accipitridae is one of the largest groups of non-passerine birds, including 68 genera and 243 species globally distributed. In the present study, we determined the complete mitochondrial sequences of two species of accipitrid, namely Aquila fasciata and Buteo lagopus, and conducted a comparative mitogenome analysis across the family. The mitogenome length of A. fasciata and B. lagopus are 18,513 and 18,559 bp with an A + T content of 54.2% and 55.0%, respectively. For both the two accipitrid birds mtDNAs, obvious positive AT-skew and negative GC-skew biases were detected for all 12 PCGs encoded by the H strand, whereas the reverse was found in MT-ND6 encoded by the L strand. One extra nucleotide‘C’is present at the position 174 of MT-ND3 gene of A. fasciata, which is not observed at that of B. lagopus. Six conserved sequence boxes in the Domain II, named boxes F, E, D, C, CSBa, and CSBb, respectively, were recognized in the CRs of A. fasciata and B. lagopus. Rates and patterns of mitochondrial gene evolution within Accipitridae were also estimated. The highest dN/dS was detected for the MT-ATP8 gene (0.32493) among Accipitridae, while the lowest for the MT-CO1 gene (0.01415). Mitophylogenetic analysis supported the robust monophyly of Accipitriformes, and Cathartidae was basal to the balance of the order. Moreover, we performed phylogenetic analyses using two other data sets (two mitochondrial loci, and combined nuclear and mitochondrial loci). Our results indicate that the subfamily Aquilinae and all currently polytypic genera of this subfamily are monophyletic. These two novel mtDNA data will be useful in refining the phylogenetic relationships and evolutionary processes of Accipitriformes.

28 citations

Journal ArticleDOI
30 Apr 2017-Gene
TL;DR: A detailed comparative analysis of the mitochondrial genomes of two Gynaephora species inhabiting different high-elevation environments: G. alpherakii and G. menyuanensis enhances the understanding of the genetic bases for the adaptive evolution of insects endemic to the QTP.

28 citations