ヨーロッパ牛の近東起源に関する遺伝的証拠
C S Troy1, D E MacHugh, J F Bailey
1Department of Genetics, Smurfit Institute, Trinity College, Dublin 2, Ireland.
Nature
|April 27, 2001
まとめ
古代と現代の牛のDNAの遺伝子解析は,ヨーロッパの牛は,近東から生まれたことを明らかにしています. この研究は,牛の家畜化の歴史を明らかにし,牛の血統を近東の起源まで遡ります.
科学分野:
- 遺伝学 遺伝学とは
- 考古学考古学とは
- 動物学 動物学
背景:
- 欧州の家畜種の起源は,しばしばヨーロッパの東,アナトリアまたは肥沃な半月にある.
- 野生の牛 (Bos primigenius) は広範囲に生息しており,ヨーロッパにおけるその家畜化の歴史は不明である.
- この研究では,野生牛の家畜化がヨーロッパの初期の農業経済に寄与したかどうかを調査しています.
研究 の 目的:
- 欧州の牛の起源を特定するために.
- 現代の家畜と絶滅した家畜の遺伝的多様性を分析する.
- 野生牛の家畜化が欧州の農業に果たした役割を理解する.
主な方法:
- ミトコンドリアDNA制御領域の配列変異は,ヨーロッパ,アフリカ,近東の392匹の現存する動物から分析されました.
- 4匹の絶滅したイギリスの野生牛の配列を,現代の牛のデータと比較した.
- ハップロタイプクラスターと多様性を研究するために,系統遺伝学とネットワーク分析が使用されました.
主要な成果:
- 古代の野生の牛のDNA配列は,現代の牛とは分離した独特のクラスターを形成した.
- 現代の牛 (Bos taurus) は4つの主要なハプロタイプ群を示しており,その多様性は家畜化の歴史と一致しています.
- アフリカの牛の多様性を支配したのは明確なハプラグループであり,欧州の牛は主に近東から派生したハプラグループを特徴づけた.
結論:
- 遺伝データは,ヨーロッパ牛の近東起源を強く支持しています.
- この発見は,家畜の家畜化の歴史と地理的な起源を明らかにします.
- この研究は,動物の家畜化の追跡における古代DNAの重要性を強調しています.
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