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同源性基因以及昆虫翅膀数量的调节和进化
S B Carroll1, S D Weatherbee, J A Langeland
1Howard Hughes Medical Institute, Madison, Wisconsin, USA.
Nature
|May 4, 1995
概括
昆虫的翅膀在没有同源基因参与的情况下进化,后来受到它们的负面控制. 这项研究探讨了翅膀发育的遗传基础及其对昆虫的进化影响.
科学领域:
- 进化发育生物学 进化发育生物学
- 遗传学 是一个遗传学.
- 昆虫学 昆虫学是一门学科.
背景情况:
- 昆虫的翅膀是关键的创新,推动了超过75%的已知的动物物种的多样化.
- 化石证据表明,翅膀是从腿部部分进化的,早期的昆虫在多个身体部分上拥有翅膀.
- 虫的体型后来多样化,导致昆虫的翅膀数量有所不同.
研究的目的:
- 研究同源基因在昆虫翅膀进化中的作用.
- 了解翅膀发育的基因机制及其进化历史.
主要方法:
- 检查Drosophila melanogaster翅膀发育中的同源基因功能.
- 在一个原始的虫昆虫中分析同源的基因表达.
主要成果:
- 同源性基因不促进翅膀的形成,而是抑制在特定的身体部分.
- 不同的同源性基因在不同的段落中对翅膀发育施加负面控制.
结论:
- 翅膀很可能起源于祖先昆虫的同源基因调节.
- 翅膀的进化涉及到随后的纳入负控制的单个同源的基因在 pterygote 多样化期间.
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