最近の自然選択は,鳥の多遺伝子特性の適応的進化を引き起こします
Mirte Bosse1,2, Lewis G Spurgin3,4, Veronika N Laine1
1Department of Animal Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands.
まとめ
UKでは大きな乳房 (Parus major) が COL4A5 遺伝子に関連してより長いノックを示しています. これは 補足栄養によって引き起こされ 生殖の成功に影響する 進化的適応を示唆しています
科学分野:
- 進化生物学
- ゲノミクス
- 動物の行動
背景:
- 遺伝的選択と観察可能な特徴 (現象型) の間の関係を理解することは,進化論の研究において極めて重要です.
- 広範囲にわたる長期データがあるため, adaptation を調査するための貴重なモデルを提供している.
研究 の 目的:
- 選択の遺伝子シグネチャーが 巨乳のフィットネスと表型変異にどのように影響するか調査する.
- ビル形態と適応における役割に関連した特定の遺伝子を特定する.
主な方法:
- イギリスとオランダの長期間研究から得られた広範なデータを使用した.
- 差異的選択下で候補遺伝子を特定するために,ゲノム領域分析を使用した.
- 遺伝的構造の分析を行い,遺伝子変異をビルの長さと生殖の成功と関連付けました.
主要な成果:
- 選択中のゲノム領域には, bill 形態の候補遺伝子,特にコラーゲン遺伝子 COL4A5 が含まれていた.
- COL4A5遺伝子の変異は,小 billの長さの有意な変化を説明しました.
- ビル長とCOL4A5の変動はフィーダー使用と相関しており,補足餌への適応を示唆しています.
結論:
- イギリスのオオカミの集団では 長いノックが常に選択されていることが 明らかです
- COL4A5遺伝子は,ヒツジの長さの変化と繁殖の成功に重要な役割を果たしています.
- 長口は,英国での補足的な餌環境への適応反応を表すかもしれません.
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