マリン・ミッスル (Mytilus mussel) の親子のミトコンドリアDNAの広範囲にわたる遺伝に関する直接的な証拠
E Zouros1, K R Freeman, A O Ball
1Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada.
Nature
|October 1, 1992
まとめ
動物におけるミトコンドリアDNA (mtDNA) の遺伝は,典型的には母性である. しかし,この研究は,マウスなどの他の動物で以前に観察されたものよりも,マウスで以前より著しく高い,広範な父親のmtDNAの寄与を明らかにしています.
科学分野:
- 進化生物学の進化生物学について
- 遺伝学 遺伝学とは
- マリン・バイオロジー マリン・バイオロジー
背景:
- 動物におけるミトコンドリアDNA (mtDNA) の遺伝は,伝統的に厳密に母性と考えられてきました.
- 最近の研究では,ドロソフィラとマウスの間では,非常に低い周波数 (約1〜3秒) で,偶然の父親のmtDNAが漏れることを示唆しています. 10^-4) とする.
- マリン・ミッスル (Mytilus) のヘテロプラズマ個体の高頻度は,双親のmtDNA遺伝の証拠として議論されてきた.
研究 の 目的:
- 海洋イチゴ (Mytilus edulisとMytilus trossulus) の父性mtDNAの寄与の範囲を調査する.
- 他の動物モデルで報告されたものと,の父からのmtDNAの継承頻度を比較する.
主な方法:
- 2つの種:Mytilus edulisとMytilus trossulusを対象としたペアの交配が行われました.
- 母親と父親の両方のmtDNA貢献の存在と頻度について子孫を分析しました.
主要な成果:
- Mytilus.のイントラ・インタースペシフィック・クロスとインタースペシフィック・クロスの両方で,父親のmtDNAの広範な貢献が観察されました.
- マウスにおける父親のmtDNAの貢献は,ドロソフィラとマウスのために以前に推論されたものより数桁高かった.
結論:
- この発見は,Mytilus.で重要な双親のmtDNA遺伝の有力な証拠を提供する.
- 貝は,他の研究された動物群と比較して,父からのmtDNA伝播のユニークではるかに高い頻度を示しています.
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