一个单一的基因影响了Drosophila的生态分歧和伴侣选择
Henry Chung1, David W Loehlin, Héloïse D Dufour
1Howard Hughes Medical Institute and Laboratory of Molecular Biology, University of Wisconsin, Madison, WI 53706, USA.
Science (New York, N.Y.)
|February 15, 2014
概括
甲基分支的皮状碳化合物 (mbCHCs) 影响了Drosophila的干旱耐受性和伴侣选择. 由生态因素驱动的mbCHC生产的变化可能会导致物种之间的繁殖隔离.
科学领域:
- 进化生物学是进化生物学.
- 遗传学 是一个遗传学.
- 规格研究研究 规格研究
背景情况:
- 生殖隔离和物种化可能源于影响生态分歧和伴侣选择的特征的进化变化.
- 这种双重特征及其遗传基础的例子很少.
研究的目的:
- 为了研究甲基分支皮质碳化合物 (mbCHCs) 作为Drosophila serrata的双重特征,影响干燥抵抗和伴侣选择.
- 确定mbCHCs进化的遗传和分子基础.
主要方法:
- 在Drosophila物种中mbCHC产生的比较分析.
- 识别脂肪酸合成酶mFAS (CG3524) 作为mbCHC合成中的关键基因.
- 在D. serrata和D. birchii中检查mFAS基因表达和cis调节序列.
主要成果:
- 证实了mbCHCs是影响干燥抵抗和Drosophila serrata的伴侣选择的双重特征.
- 确定了mFAS基因是负责mbCHC生产的.
- 在对干燥敏感物种D. birchii. 的细胞中,mFAS表达无法检测到.
- 在D. birchii中观察到mFAS cis-regulatory序列的多个变化,导致缺乏表达.
结论:
- 由mFAS调节的mbCHC生产中的生态驱动的改变可能导致了Drosophila物种之间的繁殖隔离.
- 双重特征的进化在物种化中起着重要作用.
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