現在および将来の気候におけるアラビドプシス・タリアナのゲノムの自然選択

Moises Exposito-Alonso^1,2,3, , Hernán A Burbano^4,5

¹Department of Molecular Biology, Max Planck Institute for Developmental Biology, Tübingen, Germany.

Nature

|August 30, 2019

まとめ

気候変動は自然選択を促し植物群に影響を及ぼしますアラビドプシス・タリアナのゲノム解析は,熱乾燥した気候での強い選択を明らかにし,適応と将来の進化のリスクを予測する変異がある.

科学分野:

進化生物学
植物遺伝学
気候変動への適応

背景:

気候変動は自然淘汰の圧力として適応を促すか絶滅に導きます
現在の生物多様性のリスク評価では遺伝子組換えが気候変動に対する住民の反応に影響を及ぼすことがしばしば見過ごされています

研究の目的:

気候変動による自然選択が植物群に与える影響を調査する
異なる降雨条件下でアラビドプシス・タリアナの全ゲノム選択を推論する.
気候変動に直面している植物集団の進化的リスクを予測する.

主な方法:

517の天然のアラビドプシス・タリアナのゲノム情報を利用した.
スペインとドイツの適性を評価するために操作された降雨条件.
適合性の変化と遺伝的変異の頻度に基づくゲノム全体の自然選択を推論した.

主要な成果:

熱乾燥したスペインの地域では強い自然選択が観察され,ラインの63%が排除されました.
ゲノム全体の変異の約5%の頻度が自然選択によって変化した.
選択は局所的な適応シグネチャーから予測可能であり,似たような気候の変種が肯定的に選択された.

結論:

地中海と西シベリアのアラビドプシス・タリアナ群は気候に左右される選択に最も強い影響を受けています
干ばつや気温の上昇を含む将来の気候変動は自然淘汰をヨーロッパ全土で北に押し寄せるでしょう
ネイティブのアラビドプシス・タリアナは気候変動による重大な進化的リスクに直面しています

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