权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

DISSERTATION RESEARCH: Uncovering the geographic pattern of species evolution in Madagascar using the myrrh genus (Commiphora Jacq.) and a target-enriched nuclear genomic approach

论文研究：利用没药属（Commiphora Jacq.）和目标富集核基因组方法揭示马达加斯加物种进化的地理模式

基本信息

批准号：
1403150
负责人：
Andrea Weeks
金额：
$ 1.93万
依托单位：
George Mason University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2014
资助国家：
美国
起止时间：
2014-07-01 至 2016-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1403150&HistoricalAwards=false
关键词：
DISSERTATION RESEARCH Uncovering geographic pattern

项目摘要

In the last decade, scientific exploration of Madagascar's remarkable biodiversity and its origin has shifted to characterizing the drivers of evolution within the island. This project will use two endemic lineages of the myrrh tree genus (50 spp., Commiphora, Burseraceae) as models to test hypotheses regarding the influence of geography on species diversification in the seasonally dry tropical forests of western Madagascar. These hypotheses predict that species have arisen as a consequence of isolation caused by 1) watershed expansion and contraction, 2) river barriers, and 3) historical climate change. A subset of 959 nuclear genes will be sampled from all endemic species using a cost-effective high-throughput method that combines microfluidic amplification and massively-parallel sequencing. The resulting data will be used to reconstruct the evolutionary history of these species and will be combined with specimen-based mapping to test the overarching biogeographical hypotheses. Genomic markers developed as part of this research will also be evaluated for their transferability to other species across the angiosperm tree of life, which may expand the methodological toolkit for all plant systematists. This research will provide mentorship opportunities for two undergraduate students and will support their professional development, including presentation of their research at a national meeting. Additional outreach will be provided to involve K-12 and undergraduate students through ongoing mentorship activities.

在过去十年中，对马达加斯加非凡的生物多样性及其起源的科学探索已经转向描述岛上进化的驱动因素。该项目将使用没药树属的两个地方性谱系（50种，Commiphora，Burseraceae）作为模型，以检验关于地理对马达加斯加西部季节性干燥热带森林物种多样性的影响的假设。这些假说预测，物种的出现是由于1）流域扩张和收缩，2）河流障碍和3）历史气候变化造成的隔离的结果。将使用结合微流控扩增和大规模并行测序的具有成本效益的高通量方法，从所有特有物种中采集959个核基因的子集。由此产生的数据将被用来重建这些物种的进化历史，并将与基于达尔文的映射相结合，以测试总体的地理学假设。作为本研究的一部分开发的基因组标记也将被评估其可转移到其他物种的被子植物生命树，这可能会扩大所有植物系统学家的方法工具包。这项研究将为两名本科生提供导师机会，并将支持他们的专业发展，包括在全国会议上介绍他们的研究。将通过正在进行的导师活动，提供更多的外联活动，让K-12和本科生参与进来。