在Drosophila雄性和雌性生殖系之间,在细胞类型层面上的二元转录组分歧
Imtiyaz E Hariyani1, Sudeshna Das2, Emma M Le1
1Department of Ecology and Evolutionary Biology, University of California Irvine, CA 92697, USA.
bioRxiv : the preprint server for biology
|July 17, 2025
概括
生殖细胞中的基因表达分歧推动了物种差异. 这项研究揭示了果的丸和卵巢中细胞类型特定的进化模式,突出了男性和女性生殖系进化的对比.
科学领域:
- 进化生物学是进化的生物学.
- 基因组学就是基因组学.
- 生殖生物学 生殖生物学
背景情况:
- 生殖器官中的基因表达进化是物种分化的关键.
- 在无脊椎动物中,细胞类型解决的模式尚不清楚.
研究的目的:
- 为了研究兄弟果物种之间的细胞类型特定基因表达差异.
- 了解男性和女性生殖系的进化机制.
主要方法:
- 丸和卵巢组织的单核RNA测序 (snRNA-seq).
- 对 *Drosophila melanogaster* 和 *D. simulans* 的比较转录基因分析.
主要成果:
- 保持细胞组成,但细胞类型特异的表达和协同表达网络不同.
- 丸分歧在晚期精子细胞中达到顶峰;卵巢分歧显示X染色体丰富.
- 不同细胞类型中的基因表达幅度较窄,基因基因年龄较小,蛋白质进化速度更快.
结论:
- 在男性和女性生殖系中存在着对比的进化制度.
- 进化模式取决于细胞类型,染色体环境和选择压力.
- 这些发现揭示了驱动物种的适应性和非适应性机制.
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