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  1. 0 資料タイプ別
  2. 02 学位論文
  1. 230 大学院自然科学研究科
  2. 60 博士学位論文
  3. 10 博士学位論文

Genetic diversity of Oryzias fishes based on mitochondrial DNA variation

http://hdl.handle.net/10191/23773
http://hdl.handle.net/10191/23773
a0145aa1-a0ec-453e-9ccd-9bd3c9fc7400
名前 / ファイル ライセンス アクション
000000311963.pdf 本文 (11.2 MB)
Item type 学位論文 / Thesis or Dissertation(1)
公開日 2013-10-10
タイトル
タイトル Genetic diversity of Oryzias fishes based on mitochondrial DNA variation
タイトル
言語 en
タイトル Genetic diversity of Oryzias fishes based on mitochondrial DNA variation
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_46ec
タイプ thesis
その他のタイトル
その他のタイトル ミトコンドリアDNAの変異からみたメダカ属魚類における遺伝子的多様性
著者 Matsuda, Masaru

× Matsuda, Masaru

WEKO 48457

Matsuda, Masaru

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著者別名
識別子 48458
識別子Scheme WEKO
姓名 松田, 勝
抄録
内容記述タイプ Abstract
内容記述 Thre genus Oryzias is distributed from India to the Far East. Eleven species have been identified. Karyolooical analyses have demonstrated that the genus Oryzias has been divided into three groups, the monoarmed, the biarmed, and the fused chromosome group. Biochemical analysis of enzyme polymorphisms within the genus Oryzias has provided support for these groupings. The biarmed chromosome group includes O. latipes, O. curvinotus, O. luzonensis, and O. mekongensis. Allozymic analysis demonstrate that four genetically distinct populations exist in the O. latipes; the Northern Population, the Southern Population, the East Korean Population, and the China-West Korean Population. The genetic diversity estimated among these four populations are large enough to be considered as characteristic of interspecific comparisons. Mitochondrial DNA (mtDNA) is a valuable molecule for understanding the evolutionary relationships among individuals, populations, and species, Mitochondrial DNA is inherited maternally and nonrecombine. The nucleotide of the genome substitute rapidly in contrast to the nuclear genome. The rate is about 1-2% sequence divergence per lineage per million years, or perhaps 5-10 times faster that typical single-copy nuclear DNA. In this study I investigated genetic diversity of Oryzias fishes based on mitochondrial DNA variation . The main objectives of the present study were to survey, mtDNA polymorphism in Japanese wild population of medaka, and to presume phylogenetic relationships among the species in the biarmed chromosome group. Tile phylogenetic reconstructions are based on a restriction fragment length polymorphisms (RFLPs) of mtDNA in Korean and Japanese population. To investigate the origin of the Japanese two populations of medaka, I compared nucleotide sequence of mitochondrial control region and cytochrome b gene of four species in the biarmed chromosome group. Basic results in the present study are as follows. (1) Mitochondrial DNAs of the Japanese wild population of medaka are divided into three clusters (A to C). Cluster B was subdivided into 11 subclusters. The average nucleotide diversities among these three clusters are 8.9% (A versus B), 8.4% (A versus C), and 7.3% (B versus C). Cluster C is miner cluster. (2) Mitochondrial DNAs of Korean wild population were separated into two clusters. The average nucleotide diversity between two clusters from Korea was 8.9%. (3) The distribution patterns of five clusters and subclusters in medaka revealed strong geographical associations. (4) Nucleotide sequences of complete mitochondrial control region from two Japanese populations have tandemly repeat sequence. (5) Oryzias mekongensis had no such a tandem repeat sequences in the control region, whereas other three species had a tandemly repeat sequences. (6) The phylogenetic analysis using nucleotide sequences of complete mitochondrial cytochrome b gene indicated monophyly of Japanese major two clusters. (7) A sister relationship between O. curvinotus and O. luzonensis is also indicated. The results of mtDNA analysis suggested a scenario of speciation process in the biarmed chromosome group and intraspecific relationships in O. latipes. Oryzias mekongensis had first diverged from a common ancestor of the biarmed chromosome group. Next, 0. curvinotus- O. luzonensis and O. latipes were separated. Next, in O. latipes, the China-West Korean Population, the East Korean Population, and Japanese populations was divided. In the time, O. curvinotus and O. luzonensis are separated. Finally, Japanese two population was separated into the Northern Population and the Southern Population.
内容記述
内容記述タイプ Other
内容記述 学位の種類: 博士(理学). 報告番号: 甲第1270号. 学位記番号: 新大院博(理)甲第74号. 学位授与年月日: 平成9年3月25日
書誌情報 p. 1-113, 発行日 1997-03-25
出版者
出版者 新潟大学
著者版フラグ
値 ETD
学位名
学位名 博士(理学)
学位授与機関
学位授与機関名 新潟大学
学位授与年月日
学位授与年月日 1997-03-25
学位授与番号
学位授与番号 13101A1270
学位記番号
内容記述タイプ Other
内容記述 新大院博(理)甲第74号
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