スノーシューのウサギの季節的カモフラージュの根底にあるのは適応的内向性である
Matthew R Jones1, L Scott Mills2,3,4, Paulo Célio Alves2,5,6
1Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA. matthew2.jones@umontana.edu jmeloferreira@cibio.up.pt jeffrey.good@umontana.edu.
まとめ
雪靴のウサギはアグーティ遺伝子の遺伝的変異によって 季節的な毛皮の色に影響を与えることで 適応的な冬のカモフラージュを示します 種間の遺伝子フローに関連したこの特徴は,雪の覆いが少ない環境での生存を助けます.
科学分野:
- 進化生物学
- 遺伝学
- エコロジー
背景:
- 雪靴のウサギはカモフラージュのために季節的な毛色の変化を示し,冬には白色に変色します.
- 冬には,特に雪が少ない地域では,茶色の毛皮を保持しています.
- この変異は適応性特性に 影響する遺伝的メカニズムを示唆している.
研究 の 目的:
- スノーシューのウサギの適応的な冬のカモフラージュの多形性を調査する.
- 季節的な毛皮の色の変化における アグーティ遺伝子の役割を調べる
- この特徴に関連する進化史と潜在的な異種間遺伝子フローを理解する.
主な方法:
- アグーティ遺伝子のシス調節変異の分析
- 関連種 (ウサギとウサギ) の遺伝子配列と系統分析
- 観察された冬のコート色のフェノタイプとの遺伝的変化の相関関係.
主要な成果:
- Agouti遺伝子のシス調節的変異は季節的なコート色の発現を制御する.
- 種間の冬のコートの色によるアゴウティロカス群の遺伝的多様性.
- 繰り返し発生する異種間遺伝子フローの証拠で,黒い尻尾のジャックラビットの内進性アレルが,茶色の冬着に寄与している可能性が高い.
結論:
- 雪靴のウサギの適応的な冬のカモフラージュは,アグーティ遺伝子のシス調節変異によって引き起こされます.
- 異種間遺伝子フローは この適応性特性の進化に重要な役割を果たしています
- 遺伝的侵入は 雪の覆い面の減少など 変化する環境への適応を容易にする.
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