• Title, Summary, Keyword: molecular phylogeny

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New Animal Phylogeny (새로운 동물계통)

  • Kim, Chang-Bae;Kim, Won
    • Animal Systematics, Evolution and Diversity
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    • v.17 no.2
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    • pp.263-275
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    • 2001
  • Animal phyla in the traditional animal phylogeny were organized into an order of increasing body plan complexity, which was based on the similarities in early embryonic stages. Molecular phylogeny mainly by 18S rRNA data provides recently re-evaluation of the traditional evolutionary scenario. The current molecular-based view of animal relationships strongly suggest the burst of two groups regraded as intermediate grades of body complexity in the traditional concept and displacement of them into higher positions in the tree. The new animal tree provides a framework within new picture of bilaterian ancestor could be drawn, and comparative developmental and genomic data to be interpreted.

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The Use and Conservation in Molecular Phylogeny of Fish Mitochondrial DNAs in Korean Waters (한국산 어류 미토콘드리아 DNA의 분자계통학적 이용 및 보존)

  • Kim, Young-Ja;Kim, Il-Chan;Lee, Se-Young;Lee, Wan-Ok;Cho, Yong-Chul;Lee, Jae-Seong
    • Korean Journal of Ecology and Environment
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    • v.36 no.3
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    • pp.221-234
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    • 2003
  • Phylogenetic studies would clarify the diversity of fishes if the morphological analysis based on plesimorphy characters combined with new genetic analysis on molecular level, inferring more accurate and objective phylogeny and the taxonomy. Current molecular phylogenetic approach using mitochondrial genome provides the framework for a new hypothesis not only inferring the relationships between ancestor descendants but raveling the intra-, interspecies variation.

Nucleotide Analysis of 185 rRNA and Molecular Phylogeny of the Korean Decapods (하국산 십각류의 18S 리보솜 RNA의 염기분석과 분자계통에 관한 연구)

  • Kim, Won
    • The Korean Journal of Zoology
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    • v.35 no.1
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    • pp.80-86
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    • 1992
  • The nucleotide sequences of 185 rRNAs of the five Korean decapods were partially determined by the direct sequencing method using the reverse transcriptase. ne average GC content of five species was 51.1% which is higher than that of yeast(45.0%) and lower than those of frog (53.0%) and rat (55.6%). This result follows the general patterns of the GC content in the nucleotides of the nucleic acid shown among the various phylogenetic groups. The average ratio of transrional/transversional nucleotide substitution of pairwise comparison among six species (including Anemia salina) was 1.200 $\pm$ 0.310 when whole region alas examined. However, the ratio showed some differences when the conservative regions and variable regions frere separatelv examined. The molecular phylogenies of the five species were constructed by using two different tree making methods. In general the results support the previously reported molecular phylogeny of the decapod crustaceans. However, our results indicate thats in the analysis of the sequence dat3, the UPGMA clustering method of the distance matrix method should be carefully employed after considering the rate of nucneotide substitution in the different regions of the molecule.

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Molecular Phylogeny of the Family Tephritidae (Insecta: Diptera): New Insight from Combined Analysis of the Mitochondrial 12S, 16S, and COII Genes

  • Han, Ho-Yeon;Ro, Kyung-Eui
    • Molecules and Cells
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    • v.27 no.1
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    • pp.55-66
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    • 2009
  • The phylogeny of the family Tephritidae (Diptera: Tephritidae) was reconstructed from mitochondrial 12S, 16S, and COII gene fragments using 87 species, including 79 tephritid and 8 outgroup species. Minimum evolution and Bayesian trees suggested the following phylogenetic relationships: (1) A sister group relationship between Ortalotrypeta and Tachinisca, and their basal phylogenetic position within Tephritidae; (2) a sister group relationship between the tribe Acanthonevrini and Phytalmiini; (3) monophyly of Plioreocepta, Taomyia and an undescribed new genus, and their sister group relationship with the subfamily Tephritinae; (4) a possible sister group relationship of Cephalophysa and Adramini; and (5) reconfirmation of monophyly for Trypetini, Carpomyini, Tephritinae, and Dacinae. The combination of 12S, 16S, and COII data enabled resolution of phylogenetic relationships among the higher taxa of Tephritidae.

Phylogenetic Contributions of Partial 26S rDNA Sequences to the Tribe Helleboreae (Ranunculaceae)

  • Ro, Kyung-Eui;Han, Ho-Yeon;Lee, Sang-Tae
    • Animal cells and systems
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    • v.3 no.1
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    • pp.9-15
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    • 1999
  • Monophyly and intergeneric relationships of the tribe Helleboreae, sensu Tamura, and related genera were studied using a 1,100-bp segment at the 5'end of the 26S ribosomal RNA gene. Forty-one OTUs, including eight species of the Helleboreae, were either directly sequenced or obtained from previous publications. Data were analyzed using distance and discrete character methods to infer phylogenetic relationships among the included taxa. The inferred phylogeny did not support monophyly of either Helleboreae or Cimicifugeae whose members were intermixed in our inferred phylogeny. This result is congruent with our previous study, which recommended against finely subdividing, suprageneric higher taxa within the R-chromosome group (subfamily Ranuncluloideae, sensu lato) until more molecular data were accumulated. Our data convincingly suggest the presence of the following three monophyletic groups: the Cimicifuga group (the clade of Actaea, Cimicifuga, Souliea, Eranthis, Anemonopsis, and Beesia), the Trollius group (the clade of Trollius, Megaleranthis, Adonis), and a clade including Anemonopsis and Beesia. Our data also suggest that Trollius and Megaleranthis might be congeners and Eranthis a paraphyletic group.

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Phylogeny of Ganoderma

  • Hong, Soon-Gyu;Jung, Hack-Sung
    • Proceedings of the Zoological Society Korea Conference
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    • pp.139.2-139
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    • 1998
  • No Abstract, See Full Text

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Phylogeny, host-parasite relationship and zoogeography

  • Hasegawa, Hideo
    • The Korean Journal of Parasitology
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    • v.37 no.4
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    • pp.197-213
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    • 1999
  • Phylogeny is the evolutionary history of a group or the lineage of organisms and is reconstructed based on morphological, molecular and other characteristics. The genealogical relationship of a group of taxa is often expressed as a phylogenetic tree. The difficulty in categorizing the phylogeny is mainly due to the existence of frequent homoplasies that deceive observers. At the present time, cladistic analysis is believed to be one of the most effective methods of reconstructing a phylogenetic tree. Excellent computer program software for phylogenetic analysis is available. As an example, cladistic analysis was applied for nematode genera of the family Acuariidae, and the phylogenetic tree formed was compared with the system used currently. Nematodes in the genera Nippostrongylus and Heligmonoides were also analyzed, and the validity of the reconstructed phylogenetic trees was observed from a zoogeographical point of view. Some of the theories of parasite evolution were briefly reviewed as well. Coevolution of parasites and humans was discussed with special reference to the evolutionary relationship between Enterobius and primates.

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Molecular analyses and reproductive structure to verify the generic relationships of Hypnea and Calliblepharis (Cystocloniaceae, Gigartinales), with proposal of C. saidana comb. nov.

  • Yang, Mi Yeon;Kim, Myung Sook
    • ALGAE
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    • v.32 no.2
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    • pp.87-100
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    • 2017
  • The genera Hypnea and Calliblepharis of the family Cystocloniaceae are discriminated by their female reproductive structure, especially in the formation of carposporangia and gonimoblasts. Hypnea saidana, once classified based on obsolete evidence, has not been studied phylogenetically using molecular analysis and detailed reproductive structure though it shares many morphologic features with the genus Calliblepharis. To provide better understanding of generic relationship of H. saidana with Hypnea and Calliblepharis, we carried out molecular analyses using the nuclear-encoded small subunit ribosomal DNA (SSU) and chloroplast-encoded large subunit of the RuBisCO (rbcL), and exact morphological observations focusing on the reproductive structures of wild specimens. Our molecular phylogeny showed that H. saidana is closely related to Calliblepharis, but distinct from the clade of Hypnea. Female reproductive structure of H. saidana characterized by upwardly developing chains of carposporangia, central reticulum of cell, and gonimoblast filaments not connected to the pericarp provides definite evidence to assign the taxonomic position of this species to Calliblepharis. Based on our combined molecular and morphological analyses, we have proposed Calliblepharis saidana comb. nov., expanding the distribution of Calliblepharis habitat from the eastern Atlantic South Africa, the northern Indian Ocean, Australasia, and Brazil to the western Pacific Ocean.