歯の化石記録から進化的移行を再現する
Enni Harjunmaa1, Kerstin Seidel2, Teemu Häkkinen1
1Developmental Biology Program, Institute of Biotechnology, University of Helsinki, P.O. Box 56, FIN-00014 Helsinki, Finland.
Nature
|August 1, 2014
まとめ
研究者は,発達経路を操作することによって,ネズミの歯の進化的移行を実験的に再現しました. これは,形態学的変化がどのように起こるのかを理解し,哺乳類の進化パターンを予測するための新しい枠組みを提供します.
科学分野:
- 発達生物学 発達生物学とは
- 進化の形態学について
- パレオントロジー・パレオントロジー
背景:
- 絶滅した種の進化的関係は,主に形態学的特徴分析によって決定される.
- 性格の相互依存性の発達的基盤は,限られた実験解像度のため,ほとんど理解されていません.
- 性格の相互依存は,進化的解釈に大きく影響する.
研究 の 目的:
- 漸進的な発達的変化が形態学的文字にどのように影響するか,実験的および計算的に調査する.
- 哺乳類の歯並びにおける性格の相互依存の発達基盤を解明する.
- 形態学的パターンと進化的移行を予測するための方法を確立する.
主な方法:
- エクトディスプラシンA (EDA) タンパク質を,エダヌル変異を持つマウスの歯エクスペラントに徐々に添加する.
- キャラクターの相互依存性を分析するためのコンピューティング・モデリング.
- Eda null mouse teeth. エダ null mouse teeth. エダ null mouse teeth. エダ null mouse teeth. エダ null mouse teeth. エダ null mouse teeth. エダ null mouse teeth. エダ null mouse teeth. エダ null mouse teeth.
主要な成果:
- 発達中のEDAタンパク質レベルを調節することによって,中間歯のフェノタイプが成功しました.
- 発達に基づく性格の相互依存性が特定され,哺乳類の歯の形状を予測することができました.
- In vivo操作により,祖先の歯類の歯の特徴が再現されました.
結論:
- 進化的に情報的な移行を実験的に再現することは可能である.
- この研究は,進化論の研究における形態学的性格状態の移行を理解し予測するための発達的枠組みを提供します.
- この発見は,進化の歴史を再構築するための開発に基づく期待を示しています.
関連する概念動画
02:56The Fossil Record
22.9K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
22.9K
02:35What is Evolutionary History?
31.0K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
31.0K
02:55The Evidence for Evolution
39.8K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
39.8K
01:15Teeth
2.2K
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
2.2K
01:54Convergent Evolution
27.5K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
27.5K
02:54Evolutionary Relationships through Genome Comparisons
5.8K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
5.8K