MCA: Genomic diversification and speciation along ecological gradients in a marine fish radiation

MCA：海洋鱼类辐射中沿生态梯度的基因组多样化和物种形成

• 批准号: 2121145
• 负责人: Andres Aguilar
• 金额: $ 37.37万
• 依托单位: California State L A University Auxiliary Services Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-07-15 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2121145&HistoricalAwards=false
• 关键词: MCA; Genomic; diversification; speciation; along

Understanding the formation of new species in the marine environment has proven to be a challenging task for evolutionary biologists. The potential for high levels of migration and the apparent lack of geographical barriers create a scenario where ecological diversification and life history shifts are likely important in the speciation process. This research program will determine the genomic basis of divergence among closely related species and populations along latitudinal and depth gradients to determine the role of adaptation in the speciation process. Rockfish (Sebastes) are an ideal system to examine these questions as they are a diverse group of temperate fishes inhabiting a wide array of habitats, and they have been subject to numerous phylogenetic studies. This study will build upon a growing set of studies aimed at better understanding the speciation process in the marine environment. Training opportunities will be provided to undergraduate and graduate students at Cal State LA, and data from this project will also serve as a resource for the management of rockfish, many of which are commercially important.This project will utilize genome scans and de novo genome assemblies to test for speciation histories of rockfish associated with divergence along ecological (depth) or geographic (latitude) gradients. These findings can be used to better understand the role of natural selection on the genome and how this contributes to the diversification of this group. The first aspect of the study will examine the role that ecological adaptation along a depth gradient has played in the formation of new species. The second aspect will contrast these findings with latitudinal divergence among closely related species. Together these results will provide novel insights into the speciation history and genomic divergence for closely related marine species, and provide a framework for understanding the relative roles of selection and genetic drift on generating and maintaining marine diversity.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

事实证明，了解海洋环境中新物种的形成是进化生物学家的一项艰巨任务。高水平移民和明显缺乏地理障碍的潜力创造了一种情景，在这种情况下，生态多样化和生活历史转变在物种过程中可能很重要。该研究计划将确定沿纬度和深度梯度密切相关的物种和种群之间差异的基因组基础，以确定适应性在物种过程中的作用。岩石鱼（Sebastes）是检查这些问题的理想系统，因为它们是居住在各种栖息地的温带鱼类，并且经过了许多系统发育研究。这项研究将基于越来越多的研究，旨在更好地了解海洋环境中的物种形成过程。培训机会将向Cal State LA的本科和研究生提供，该项目的数据还将作为Rockfish管理的资源，其中许多人在商业上都很重要。该项目将利用基因组扫描和DE NOVO基因组组件来测试与生态（DEPTH）或地理（Latitive（Latitude（Latitude））相关的Rockfish的岩石鱼类差异。这些发现可用于更好地了解自然选择对基因组的作用，以及这如何促进该群体的多样化。该研究的第一方面将研究生态适应在深度梯度形成中的作用。第二个方面将这些发现与密切相关的物种之间的纬度差异进行对比。这些结果将共同为密切相关的海洋物种的物种形成史和基因组差异提供新的见解，并为理解选择和遗传漂移在产生和维持海洋多样性的相对作用的框架中提供了一个奖项。该奖项反映了NSF的法定任务，并通过使用该基金会的知识优点和广泛的效果来评估来评估NSF的法定任务。