SEX-RATIO DISTORTION IN DROSOPHILA-SIMULANS - COOCCURRENCE OF A MEIOTIC DRIVE AND A SUPPRESSOR OF DRIVE
SEX-RATIO DISTORTION IN DROSOPHILA-SIMULANS - COOCCURRENCE OF A MEIOTIC DRIVE AND A SUPPRESSOR OF DRIVE
复制标题
DOI：
10.1046/j.1420-9101.1995.8030283.x
复制
发表时间：
1995-05-01
影响因子：
2.1
通讯作者：
MONTCHAMPMOREAU, C
中科院分区：
文献类型：
--
作者：
MERCOT, H;ATLAN, A;MONTCHAMPMOREAU, C
在来自塞舌尔和新喀里多尼亚的拟态丝虫菌株中，发现了一个性别比扭曲因子。这一因子在那些对其产生抗药性的菌株中表达很差或不表达。来自新喀里多尼亚或塞舌尔的雌性与来自不同地理来源的雄性杂交，发现了它的存在。大多数获得的F_1代雄鱼在其后代中产生了过剩的雌性(高达99%)。这两个菌株都感染了沃尔巴克氏菌，但这些微生物体并不参与性别比例的扭曲。性别比因子是X连锁的减数分裂驱动因子；核抗性因子(S)通过抑制该驱动作用发挥作用。很可能是同一个X定位的驱动因素入侵了这两个群体，这两个群体随后产生了对它的抗性因子(S)。
A sex-ratio distortion factor was found at high frequency in D. simulans strains from Seychelles and New Caledonia. This factor is poorly or not expressed within those strains which are resistant to it. Its presence was detected by crossing females from New Caledonia or the Seychelles with males from a different geographic origin. Most of the Fl males obtained produced an excess of females (up to 99%) in their progeny. The two strains are infected with Wolbachia, but these micro-organismms are not involved in the sex-ratio distortion. The sex-ratio factor is shown to be an X-linked meiotic driver; nuclear resistance factor(s) act by suppressing the drive. It is likely that the same X-located driver invaded the two populations, which subsequently developed resistance factor(s) against it.