社会的なアメーバDictyostelium discoideumにおける利他主義と社会的な不正行為
J E Strassmann1, Y Zhu, D C Queller
1Department of Ecology and Evolutionary Biology, Rice University, Houston, Texas 77251-1892, USA. strassm@rice.edu
Nature
|January 5, 2001
まとめ
社会的なアメーバであるDictyostelium discoideumは,混合クローンからキメラを形成する. 多くの混合物は,他者を搾取する"詐欺師"クローンを示し,協力だけでなく,開発における競争を明らかにしています.
科学分野:
- 進化生物学の進化生物学について
- 発達生物学 発達生物学とは
- 社会的行動 社会的行動
背景:
- ディクティオステリウム・ディスコイデウム (Dictyostelium discoideum) は,多細胞発達のモデル生物である.
- 細胞は飢えた時に集まってスラグを形成し,一部の細胞は利他的に不妊の茎を形成します.
研究 の 目的:
- 開発過程におけるDictyostelium discoideumの異なるクローン間の社会的ダイナミクスと利用の可能性を調査する.
- 協同開発が標準なのか,それともクローン同士が競合しているのかを判断する.
主な方法:
- 自然の集団からDictyostelium discoideumのクローンを収集する.
- 異なるクローンのキメリックミックスを作り出す.
- マイクロサテライトマーカーを使用してクローン貢献を追跡し,搾取を特定します.
主要な成果:
- 異なるクローンが混ざり合ってキメラを形成する.
- キメリック混合物の半分は,明確な"詐欺師"と"犠牲者"のクローンを示した.
- クローンが他のクローンを搾取するために,茎の貢献を減らすために選択された証拠.
結論:
- Dictyostelium discoideumの開発は,クローン間の競争と利益の対立を含み,純粋な協力だけではない.
- この社会的競争は,社会進化を研究するための貴重なモデルとなっています.
- この発見は,純粋に協同開発のためのモデルとしてその使用を複雑にします.
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