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

Dissertation Research : Ecological Factors in Tetraploid Speciation

论文研究: 四倍体物种形成的生态因素

基本信息

批准号：
0105116
负责人：
Maureen Stanton
金额：
$ 0.91万
依托单位：
University of California-Davis
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2001
资助国家：
美国
起止时间：
2001-06-15 至 2003-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0105116&HistoricalAwards=false
关键词：
Dissertation Research Ecological Factors Tetraploid

项目摘要

Stanton0105116Unlike humans, plant species often have more than two sets of chromosomes. These polyploid plants, 30 to 70% of all plant species, are usually unable to mate with diploid individuals with two sets of chromosomes, and so they are considered different species. When a polyploid plant originates from diploid progenitors, how does it succeed, if the surrounding plants interfere with reproduction? One possibility is that the two types of plants have different habitat requirements. If so, their spatial separation may prevent reproductive interference. This project will examine whether the plant species, Ranunculus adoneus, with 16 or 32 chromosomes have different requirements for their survival, growth, and reproduction. Populations with different chromosome counts grow in separate places in the Colorado Rockies. This experiment will monitor survival and growth of seedlings transplanted between locations. Reproductive interference will be demonstrated if adding pollen from the other plant type reduces the number of seeds produced.Understanding the forces generating and maintaining biological diversity is one of the fundamental goals of biology. Polyploid speciation has been an important process leading to new plant species, but is not well understood. This study asks how new plant species originate, and so seeks to understand a major source of plant diversity.

Stanton0105116与人类不同，植物物种通常有两组以上的染色体。这些多倍体植物占所有植物物种的30%到70%，通常无法与具有两套染色体的二倍体个体交配，因此它们被认为是不同的物种。当多倍体植物起源于二倍体祖先时，如果周围的植物干扰繁殖，它如何成功呢？一种可能性是，这两种植物对栖息地的要求不同。如果是这样的话，它们的空间分隔可能会防止生殖干扰。这个项目将研究拥有16条或32条染色体的植物毛茅是否对它们的生存、生长和繁殖有不同的要求。不同染色体数目的种群生长在科罗拉多州落基山脉的不同地方。这项实验将监测在不同地点之间移植的幼苗的存活和生长情况。如果添加来自另一种植物类型的花粉减少种子产生的数量，就会证明生殖干扰。理解产生和维持生物多样性的力量是生物学的基本目标之一。多倍体物种形成是导致植物新物种形成的一个重要过程，但人们对多倍体物种的认识还不够深入。这项研究询问新的植物物种是如何起源的，因此试图了解植物多样性的一个主要来源。