雌性和雄性葡萄蠹蛾 Lobesia botrana 之间的相互作用改变了进一步的交配偏好。

IF 2.3 2区 农林科学 Q1 ENTOMOLOGY
Léa Lorrain-Soligon , Karen Muller , Camille Delaby , Denis Thiéry , Jérôme Moreau
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引用次数: 0

摘要

在繁殖过程中,雌性可能会根据雄性提供的直接物质利益(如新婚礼物)进行选择,从而提高自身的适应能力。在鳞翅目昆虫中,雄性提供含有营养物质的精囊。然而,处女雄性会产生更大的精囊,其中包含精子和营养物质,从而提高雌性的生育能力。鳞翅目雌虫可以检测雄虫的性状况,因此可能更喜欢没有交配经验的雄虫(即处男)。这种配偶选择可以通过使用化学指标来实现,如性信息素和角质化合物,已知它们可能在繁殖过程中进行交换,可以作为先前交配经历的指标,已知它们可能是信息交换的来源。在本研究中,我们通过实验将草履虫处女雄性与雌性放在一起,让它们接触雌性的天然性信息素或角质化合物。在雄性暴露于雌性的性信息素或角质化合物12或48小时后,这些雄性将面对天真的雌性,雌性可以在它们或未暴露的处女雄性之间做出选择。我们发现,尽管产生的精子体积相似,但所有暴露的处男在暴露12小时后与雌性交配的可能性都较低,而暴露48小时后,只有暴露于性信息素的处男才会出现这种情况。因此,L. botrana雌性可能会根据化学线索(或者是雌性直接传递给雄性的线索,或者是雄性角质层或信息素特征的变化)来辨别雄性的性经验,这些线索表明雄性有过去的交配经验。接触性信息素 12 小时后的雄性交配持续时间更长,接触角质化合物 48 小时后的雄性交配持续时间更长。信息素信号可能更持久,似乎更容易为雄性收集信息。这一结果背后的生理原因仍有待研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Interaction between females and males grapevine moth Lobesia botrana modifies further mating preference

Interaction between females and males grapevine moth Lobesia botrana modifies further mating preference

During reproduction, females may boost their fitness by being selective based on direct material benefits provided by the males, such as nuptial gifts. In Lepidoptera, male provides a spermatophore containing nutrients. However, virgin males produce a bigger spermatophore, containing spermatozoa and nutrients, allowing higher female fertility. Lepidoptera females that could detect the sexual status of males may thus prefer a male without previous mating experience (i.e. a virgin male). This mate selection could be achieved by the use of chemical indices, such as sexual pheromones and cuticular compounds, known to be possibly exchanged during reproduction, and which can be indicators of a previous mating experience and known to be possibly sources of information exchanged. In this study, we experimentally presented Lobesia botrana virgin males with females in order for them to be exposed to females’ natural sexual pheromones or cuticular compounds. 12 or 48 h after the exposure of males to either females’ sexual pheromones or cuticular compounds, these males were confronted to naïve females, which have a choice between them or a virgin non-exposed males. We highlighted that, despite producing a spermatophore of similar volume, all exposed virgin males were less likely to mate with females 12 h after exposure, while after 48 h of exposure this is only the case for virgin males exposed to sexual pheromones. L. botrana females may thus discriminate male sexual experience based on chemical cues (either from cues transferred directly from females to males, or from changes in the cuticular or pheromone males’ profile) indicating past mating experiences. Mating duration was longer for males exposed to sexual pheromones after 12 h only, and for males exposed to cuticular compounds after 48 h only. Pheromones signal might be more persistent over time and seems to more easily gather information for males. The physiological reasoning behind this result still needs to be investigated.

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来源期刊
Journal of insect physiology
Journal of insect physiology 生物-昆虫学
CiteScore
4.50
自引率
4.50%
发文量
77
审稿时长
57 days
期刊介绍: All aspects of insect physiology are published in this journal which will also accept papers on the physiology of other arthropods, if the referees consider the work to be of general interest. The coverage includes endocrinology (in relation to moulting, reproduction and metabolism), pheromones, neurobiology (cellular, integrative and developmental), physiological pharmacology, nutrition (food selection, digestion and absorption), homeostasis, excretion, reproduction and behaviour. Papers covering functional genomics and molecular approaches to physiological problems will also be included. Communications on structure and applied entomology can be published if the subject matter has an explicit bearing on the physiology of arthropods. Review articles and novel method papers are also welcomed.
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