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2011 International Conference on Future Software Engineering and Multimedia Engineering(FSME 2011)

作者： Mei Tian Xin Shen Xue-ping Meng Han-liang Cheng College of Marine Science Huaihai Institute of Technology

Sea urchins belong to the phylum Echinodermata and the class echinoidea, which are economic marine organisms that have higher nutritious, medicinal, ecological and scientific valueIn this paper, a comprehensive bioinformatics analysis based on 6 sea urchins mitochondrial genomes has been done, including the basic characteristics of the mitochondrial genome, proteincoding genes, gene order and genetic variation and so onThe length of 6 sea urchins mitochondrial genomes are between 15, 650 bp and 15, 767 bpAll 6 mitochondrial genomes are coding metazoan 37 standard genesThe gene orders are identical for 6 sea urchins mitochondrial genomesThe basic holothuroids and sea urchins mitochondrial gene orders are identical and the gene arrangement shared by sea urchins and basic holothuroids is the echinoderm ground patternExcept for the atp8 gene, Ka/Ks ratio of the rest 12 mitochondrial protein-coding genes is much lower than 1（between 0 and 0.1997）, indicating a strong purifying selection（negative selection）However, the atp8 gene of Strongylocentrotus mitochondrial genomes encounter positive selection（Darwin selection）, which is the first time reported in the mitochondrial genomes of marine invertebratesThe genetic variation analysis of 15 main genes（13 protein coding genes and 2 ribosomal RNA genes） among 6 sea urchins and 3 Strongylocentrotus showed that nad5, nad4 and cox1 genes are ideal molecular markers in sea urchin population genetics studies and can be applied in the analysis of genetic diversity within different groups, which providing a reference for the conservation of sea urchins biological diversity and use of the biological resources rationally.

关键词： Mitochondrial Genome echinoidea Gene Order Genetic Different Loci Molecular Marker

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Spatangoid Echinoid Fossil,Brissopsis pohangenesis ***.,from the Duho Formation,Pohang Basin,Korea

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地学前缘 2009年第S1期16卷 254-254页

作者： Bong Jin Lee Seong-Joo Lee Department of Geology Kyungpook National University

A great number of the Cenozoic echinoid fossils were found from the Duho Formation of the Pohang Basin,*** of the echinoid fossils,ranging from 2-8 cm in diameter,were preserved as flattened or crushed ***,each side(oral or aboral) containing diagnostic features is well preserved in the flattened *** echinoid fossils belonging to the order Spatangoida,a group

关键词： echinoidea Spatangoida Pohang Basin Duho Formation Brissopsis pohangenesis

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