Zhou Jiayong, Liu Shuang, Liu Hongkai, Xie Zhensheng, Liu Liping, Lin Lifeng, Jiang Jinyong, Yang Mingdong, Zhou Guofa, Gu Jinbao, Zhou Xiaohong, Yan Guiyun, James Anthony A, Chen Xiao-Guang
Department of Pathogen Biology, Institute of Tropical Medicine, School of Public Health, Southern Medical University, Guangzhou 510515, China.
Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China.
PNAS Nexus. 2022 Apr 14;1(2):pgac041. doi: 10.1093/pnasnexus/pgac041. eCollection 2022 May.
is the most invasive mosquito in the world and often displaces in regions where their populations overlap. Interspecific mating has been proposed as a possible cause for this displacement, but whether this applies across the range of their sympatry remains unclear. and collected from allopatric and sympatric areas in China were allowed to interact in cage experiments with different crosses and sex-choices. The results confirm that asymmetric interspecific mating occurs in these populations with matings between allopatric males and females being significantly higher (55.2%) than those between males and females (27.0%), and sympatric mosquitoes showed a similar but lower frequency bias, 25.7% versus 6.2%, respectively. The cross-mated females can mate second time (remate) with the respective conspecific males and the 66.7% remating success of female was significantly higher than the 9.3% of females. Furthermore, 17.8% of the matings of males exposed to mixed pools of females and 9.3% of the matings of males with mixed and females were interspecific. The difference in the length of clasper between male (0.524 mm) and (0.409 mm) may be correlated with corresponding mates. We conclude that stronger male interspecific mating and more avid female intraspecific remating result in a satyr effect and contribute to competitive displacement of as allopatric invade during range expansion.
是世界上最具侵入性的蚊子，在其种群重叠的地区常常取代 。种间交配被认为是这种取代的一个可能原因，但这是否适用于它们同域分布的整个范围仍不清楚。在中国异地和同域地区收集的 和 在笼子实验中进行不同杂交和性别选择的相互作用。结果证实，这些种群中发生了不对称种间交配，异地 雄蚊与 雌蚊之间的交配显著高于 雄蚊与 雌蚊之间的交配（55.2%对27.0%），同域蚊子表现出类似但频率较低的偏差，分别为25.7%对6.2%。杂交雌蚊可以与各自的同种雄蚊再次交配（重新交配）， 雌蚊66.7%的重新交配成功率显著高于 雌蚊的9.3%。此外，暴露于 雌蚊混合群体中的 雄蚊的交配中有17.8%以及与 和 雌蚊混合的 雄蚊的交配中有9.3%是种间交配。雄蚊 （0.524毫米）和 （0.409毫米）抱握器长度的差异可能与相应的配偶有关。我们得出结论，更强的 雄蚊种间交配和更强烈的 雌蚊同种内重新交配导致了色狼效应，并在异地 在范围扩张期间入侵时促成了 的竞争性取代。
