当前位置: X-MOL 学术Mol. Biol. Evol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Sex-Ratio Meiotic Drive Shapes the Evolution of the Y Chromosome in Drosophila simulans.
Molecular Biology and Evolution ( IF 11.0 ) Pub Date : 2019-12-01 , DOI: 10.1093/molbev/msz160
Quentin Helleu 1, 2 , Cécile Courret 1 , David Ogereau 1 , Katie L Burnham 1, 3 , Nicole Chaminade 1 , Mohamed Chakir 4 , Sylvie Aulard 1, 5 , Catherine Montchamp-Moreau 1
Affiliation  

The recent emergence and spread of X-linked segregation distorters-called "Paris" system-in the worldwide species Drosophila simulans has elicited the selection of drive-resistant Y chromosomes. Here, we investigate the evolutionary history of 386 Y chromosomes originating from 29 population samples collected over a period of 20 years, showing a wide continuum of phenotypes when tested against the Paris distorters, from high sensitivity to complete resistance (males sire ∼95% to ∼40% female progeny). Analyzing around 13 kb of Y-linked gene sequences in a representative subset of nine Y chromosomes, we identified only three polymorphic sites resulting in three haplotypes. Remarkably, one of the haplotypes is associated with resistance. This haplotype is fixed in all samples from Sub-Saharan Africa, the region of origin of the drivers. Exceptionally, with the spread of the drivers in Egypt and Morocco, we were able to record the replacement of the sensitive lineage by the resistant haplotype in real time, within only a few years. In addition, we performed in situ hybridization, using satellite DNA probes, on a subset of 21 Y chromosomes from six locations. In contrast to the low molecular polymorphism, this revealed extensive structural variation suggestive of rapid evolution, either neutral or adaptive. Moreover, our results show that intragenomic conflicts can drive astonishingly rapid replacement of Y chromosomes and suggest that the emergence of Paris segregation distorters in East Africa occurred less than half a century ago.

中文翻译:

性比率减数分裂驱动器塑造果蝇simulans中Y染色体的进化。

X连锁分离畸变最近被称为“巴黎”系统,这种现象在全世界的果蝇模拟物种中引起了人们对抗驱动Y染色体的选择。在这里,我们调查了386个Y染色体的进化历史,这些历史来源于20年来收集的29个人群样本,在针对巴黎变形者进行测试时,显示了从高灵敏度到完全抗性的广泛表型连续性(雄性约95%-雄性)。约40%的雌性后代)。分析9个Y染色体的代表性子集中的约13 kb的Y连锁基因序列,我们确定了仅三个多态性位点,导致了三个单倍型。值得注意的是,单倍型之一与抗性有关。这种单倍型在来自撒哈拉以南非洲地区(驾驶员来源地区)的所有样本中都是固定的。例外地,随着驱动程序在埃及和摩洛哥的普及,我们能够在短短几年内实时记录抗性单倍型对敏感谱系的替换。此外,我们使用卫星DNA探针在六个位置的21个Y染色体子集中进行了原位杂交。与低分子多态性相反,这揭示了广泛的结构变异,暗示了中性或适应性的快速进化。此外,我们的研究结果表明,基因组内部冲突可能会导致Y染色体的惊人快速替换,并表明东非的巴黎偏析畸变的出现发生在不到半个世纪之前。我们能够在短短几年内实时记录抗性单倍型对敏感谱系的替代情况。此外,我们使用卫星DNA探针在六个位置的21个Y染色体子集中进行了原位杂交。与低分子多态性相反,这揭示了广泛的结构变异,提示中性或适应性快速进化。此外,我们的研究结果表明,基因组内部冲突可能会导致Y染色体的惊人快速替换,并表明东非的巴黎偏析畸变的出现发生在不到半个世纪之前。我们能够在短短几年内实时记录抗性单倍型对敏感谱系的替代情况。此外,我们使用卫星DNA探针在六个位置的21个Y染色体子集中进行了原位杂交。与低分子多态性相反,这揭示了广泛的结构变异,提示中性或适应性快速进化。此外,我们的研究结果表明,基因组内部冲突可能会导致Y染色体的惊人快速替换,并表明东非的巴黎偏析畸变的出现发生在不到半个世纪之前。这揭示了广泛的结构变异,暗示了中性或适应性的快速进化。此外,我们的研究结果表明,基因组内部冲突可以驱动Y染色体惊人地快速替换,并表明在不到半个世纪之前,东非的巴黎种族隔离现象就出现了。这揭示了广泛的结构变异,暗示了中性或适应性的快速进化。此外,我们的研究结果表明,基因组内部冲突可能会导致Y染色体的惊人快速替换,并表明东非的巴黎偏析畸变的出现发生在不到半个世纪之前。
更新日期:2019-07-10
down
wechat
bug