Dissertation Research: Integrating Biosystematics and Phylogenetics: Floral Diversity, Polyploidy, and Serpentine Endemism in the Recently Resurrected Plant Family Themidaceae

论文研究：整合生物系统学和系统发育学：最近复活的植物科植物的花多样性、多倍体和蛇纹石特有现象

基本信息

批准号：
9902169
负责人：
Kenneth Sytsma
金额：
$ 1万
依托单位：
University of Wisconsin-Madison
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1999
资助国家：
美国
起止时间：
1999-08-01 至 2001-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9902169&HistoricalAwards=false
关键词：
Dissertation Research Integrating Biosystematics Phylogenetics

项目摘要

Sytsma and Pires 9902169Integrating biosystematics (the experimental study of biological aspects of organismal variation, diversity and diversification) and phylogenetics (the study of genealogical relationships of organisms) has been a promising avenue for evolutionary and ecological investigations because genealogies provide a meaningful historical context for making biological comparisons. Themidaceae is a recently resurrected plant family of onion-like herbs from western North America. The family is an ideal model system because several genera (e.g., Brodiaea) are incredibly diverse with respect to floral features, chromosome number, and habitat preference. Polyploidy - when an organism contains two or more sets of chromosomes -appears common, and a significant number of species are endemics found only on California islands, serpentine soils, or other unusual substrates. Genealogical histories will be derived using both molecular and morphological data. This historical context will be integrated with newchromosome painting techniques to determine the types of polyploidy andkinds of chromosomal change involved in speciation and endemism within thefamily. Chromosome painting can also assist in determining which DNAsequences should be compared for genealogical studies. Preliminary resultshave already revealed new morphological, cytological, and ecological insights at various taxonomic levels within the Themidaceae.

Sytsma和Pires 9902169 intergenteriatienting Biosystematics（对生物学变异，多样性和多样性的生物学方面的实验研究）和系统发育学（对生物体的家谱关系的研究）是进化和生态研究的有希望的途径，因为谱系提供了一种有意义的历史历史上下文。 Themidaceae是来自北美西部的洋葱状草药的最近复活的植物家族。该家族是理想的模型系统，因为在花卉特征，染色体数和栖息地偏好方面，几个属（例如Brodiaea）非常多样化。多倍体 - 当生物含有两组或多种染色体时 - 出现常见，大量物种是仅在加利福尼亚群岛，蛇纹石土壤或其他异常底物上发现的。谱系历史将使用分子和形态学数据得出。这种历史上下文将与纽染色体绘画技术集成，以确定染色体变化的多倍体和素的类型，这些变化涉及的染色体变化。染色体绘画还可以帮助确定应该比较哪些dnasequences进行家谱研究。初步结果阳光局已经揭示了Themidaceae内各种分类学水平的新形态学，细胞学和生态见解。