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Mechanisms and Evolution of Post-Reproductive Lifespan

生殖后寿命的机制和演变

基本信息

批准号：
2057243
负责人：
金额：
--
依托单位：
University College London
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2018
资助国家：
英国
起止时间：
2018 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2057243
关键词：
Mechanisms Evolution Post Reproductive Lifespan

项目摘要

Post-reproductive lifespan (PRL) is a life history stage found in distantly related taxa in both vertebrates and invertebrates. Ultimate explanations for the evolution of PRL remain contentious, and the proximate mechanisms which facilitate and regulate PRL are poorly understood. The potential influences of life history traits, physiological condition and ecological constraints on the occurrence of PRL are not known. In social insects, PRL may represent a stage in the transition from simple cooperative sociality (where workers retain reproductive potential) to pre-imaginal caste determination, a defining feature of complex eusociality. This project will investigate reproductive potential and PRL in the sister species Polistes lanio and Polistes canadensis, two simply eusocial tropical paper wasp. The workers of tropical Polistes species display loss of reproductive potential with age. I will determine the functional consequences of PRL on 'risky' altruistic behaviour, reproductive conflict and reproductive physiology through field experiments, behavioural analyses and examination in the lab. Using transcriptomics and gene ontology, I will identify potential molecular mechanisms associated with PRL in this invertebrate system. Understanding the molecular and physiological mechanisms and the phenotypic consequences of PRL will provide insights into the evolution of reproductive plasticity and the predetermination of caste identity in complex eusociality.

生殖后寿命（PRL）是在脊椎动物和无脊椎动物的远亲类群中发现的生活史阶段。PRL进化的最终解释仍然存在争议，促进和调节PRL的近端机制知之甚少。生活史性状、生理条件和生态限制对PRL发生的潜在影响尚不清楚。在社会性昆虫中，PRL可能代表了从简单的合作社会性（工人保留生殖潜力）到前想象种姓决定的过渡阶段，这是复杂的真社会性的一个定义特征。本研究将探讨两种简单的真社会性热带纸胡蜂--美洲胡蜂和加拿大胡蜂的生殖潜力和催乳素。热带Polistes物种的工人显示随着年龄的增长，生殖潜力的损失。我将通过野外实验、行为分析和实验室检查来确定PRL对“危险”利他行为、生殖冲突和生殖生理的功能后果。使用转录组学和基因本体论，我将确定潜在的分子机制与PRL在这个无脊椎动物系统。了解PRL的分子和生理机制以及表型后果将为复杂的真社会性中生殖可塑性的演变和种姓身份的预先确定提供见解。