プレタピウス と エキドナ の ゲノム は,哺乳類 の 生物学 と 進化 を 明らか に し て い ます
Yang Zhou1,2, Linda Shearwin-Whyatt3, Jing Li4
1BGI-Shenzhen, Shenzhen, China.
Nature
|January 7, 2021
まとめ
卵を産む哺乳類であるウナギやエキドナの ゲノム解析により 独特の性染色体の起源と適応が明らかになりました これらの発見は哺乳類の初期の進化と 袋類とエウテリアンとの差異について 重要な洞察をもたらします
科学分野:
- ゲノミクス
- 進化生物学
- 哺乳類の遺伝学
背景:
- モノトリーム (卵を産む哺乳類) は,テリアン (マースピアルとユーテリアン) の唯一の哺乳類外集団として進化的に重要な.
- モノトレムゲノムの理解は,哺乳類の進化の基本的な側面に関する重要な洞察を提供します.
研究 の 目的:
- オルニトリンクス・アティヌス (Ornithorhynchus anatinus) とエキドナ (Tachyglossus aculeatus) の参照ゲノムを生成して分析する.
- モノトリームにおける祖先および系統特有のゲノム変化とその哺乳類の進化への影響を特定する.
主な方法:
- 整体ゲノム配列化と牛と牛の組み立て
- モノトレムとテリアの比較ゲノム解析
- 染色体アンカリングと白鳥ゲノムの遺伝子アノテーション.
主要な成果:
- 染色体に固定された非常に連続した白鳥のゲノムアセンブリが生成されました
- モノトレム性染色体複合体は祖先のリング構成から進化したことを示唆している.
- ハプトグロービン,乳育,化学感受受体遺伝子の有意な差異は,セリアンと比較して確認された.
結論:
- この研究は,モノトリームの高品質のゲノム情報源を提供し,哺乳類の進化に関する理解を深めています.
- モノトレムの独特の性染色体複合体は,広範囲の染色体相互作用から生じた可能性が高い.
- 免疫,授乳,感覚知覚に関連する遺伝子のゲノム適応が,単一性の生態学的専門性の基礎となっている.
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