中国におけるアニオスペルマ植物の進化史
Li-Min Lu1, Ling-Feng Mao2, Tuo Yang1
1State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
Nature
|February 9, 2018
まとめ
中国
科学分野:
- 系統遺伝学と進化生物学
- バイオジオグラフィ
- 植物学
背景:
- 高い種の多様性は,最近の種化 ("ゆりかご") または古代の蓄積 ("博物館") から生じる可能性があります.
- 地球上のアニオスペルムの10%を占める中国は 地質学的な歴史と多様な系統のために と博物館の両方と考えられています
- 以前の研究では,中国の樹木種植物の組成を理解するために詳細な系統遺伝分析が欠けていました.
研究 の 目的:
- 中国のアニオスペルマの空間時間的な多様性を調査する.
- 植物の主要な構成要素が どのようにして組み立てられたかを 調べるためだ
- 花の進化における重要な領域とその役割 (ゆりかご vs. 博物館) を特定する.
主な方法:
- 地域アンジオスペルマ属の92%の年代付けされた系統を活用した.
- ほぼ完全な種別ツリー (26,978種) を構築した.
- 詳細な空間分布データを組み込んで 系統学的分析を行う.
主要な成果:
- 中国のアニオスペルマ属の66%はミオセーン (≥23万年前) に由来する.
- 中国東部では,より古い多様性 (22.0425.39 Mya),遺伝的過剰分散,より高い多様性がある.
- 西中国では,より最近の分岐 (15.2918.86 Mya),系統遺伝的集団化,およびより低い多様性が示されています.
結論:
- 東シナは草木類と樹木類の植物博物館として機能し,樹木類のとして機能する.
- 中国西部は 草木類の進化の原点として機能しています
- 種の多様性や遺伝学的な多様性に基づいて 重要な保全地域を特定した.
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