The cranial gland system of Nasonia spp.: a link between chemical ecology, evo-devo, and descriptive taxonomy (Hymenoptera: Chalcidoidea).

IF 2.1 3区 农林科学 Q1 ENTOMOLOGY
Holly A Hoag, Monique Raymond, Jonah M Ulmer, Szabina Schwéger, Thomas van de Kamp, Elias Hamann, Marcus Zuber, John H Werren, Grace Gaucher, Missy Hazen, István Mikó
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引用次数: 0

Abstract

Nasonia is an emerging model system for investigating the evolution of complex species-specific behavioral and morphological phenotypes. For example, the male head shape differs considerably between Nasonia Ashmead (Hymenoptera: Chalcidoidea) species. In addition, differences in courtship behaviors, and possibly influences of a male-specific aphrodisiac pheromone, contribute to interspecific prezygotic isolation. However, the possible relationships between courtship, pheromone signaling, and male head shape are unknown. Using multimodal imaging techniques, we conducted a comprehensive examination of the skeletomuscular and exocrine gland systems of the lower head region of all 4 Nasonia species and their sister genus Trichomalopsis Crawford (Hymenoptera: Chalcidoidea). This analysis reveals the presence of 3 undescribed exocrine glands in the lower head region and a unique mandibular modification, the basal mandibular carina, that might be involved in pheromone spread. We performed morphometric and volumetric analyses using 3D datasets from synchrotron X-ray microtomography and found that the size of the genomandibular gland and the corresponding basal mandibular carina correlates with both interspecific courtship length and head shape differences, indicating that this gland is a likely source of the oral aphrodisiac pheromone. These differences correlate with the prevalence of within-host mating rather than phylogenetic relatedness in Nasonia species, with increased within-host mating occurring in species with larger genomandibular glands. Our findings create an opportunity to better understand the complex gene regulatory networks underlying superficially unrelated traits and serve as a link between behavior, chemical ecology, evo-devo, and descriptive taxonomy.

纳蜂属的颅腺系统:化学生态学、进化和描述分类之间的联系(膜翅目:蜂总科)。
纳索尼亚是一个新兴的模型系统,用于研究复杂的物种特异性行为和形态表型的进化。例如,雄性的头形在纳索尼亚阿什米德(膜翅目:蜂总科)种之间差别很大。此外,求偶行为的差异,以及雄性特异性催情信息素的可能影响,有助于种间合子前分离。然而,求偶、信息素信号和雄性头部形状之间的可能关系尚不清楚。利用多模态成像技术,对4种纳蜂属及其姊妹属Trichomalopsis Crawford(膜翅目:蜂总科)的下头区域的骨骼肌和外分泌腺系统进行了全面的研究。这一分析揭示了在头部下部区域存在3个未描述的外分泌腺和一个独特的下颌修饰,即下颌基底隆突,这可能与信息素的传播有关。我们使用同步加速器x射线微断层扫描的三维数据集进行了形态计量学和体积分析,发现下颌基底隆突的大小与种间求偶时间和头部形状差异相关,表明该腺体可能是口服春药信息素的来源。这些差异与纳索尼亚物种中宿主内交配的普遍程度有关,而不是系统发育上的亲缘关系,在基因组和下颌腺较大的物种中,宿主内交配的增加。我们的发现为更好地理解表面上不相关的性状背后的复杂基因调控网络提供了机会,并作为行为、化学生态学、进化-发展和描述性分类学之间的联系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Insect Science
Journal of Insect Science 生物-昆虫学
CiteScore
3.70
自引率
0.00%
发文量
80
审稿时长
7.5 months
期刊介绍: The Journal of Insect Science was founded with support from the University of Arizona library in 2001 by Dr. Henry Hagedorn, who served as editor-in-chief until his death in January 2014. The Entomological Society of America was very pleased to add the Journal of Insect Science to its publishing portfolio in 2014. The fully open access journal publishes papers in all aspects of the biology of insects and other arthropods from the molecular to the ecological, and their agricultural and medical impact.
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