Dissertation Research: Can Vegetative Reproduction Explain the Abundance of Understory Shrubs in Tropical Forests?

论文研究：无性繁殖能否解释热带森林中林下灌木的丰富程度？

基本信息

批准号：
0508471
负责人：
James Dalling
金额：
$ 1.18万
依托单位：
University of Illinois at Urbana-Champaign
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2005
资助国家：
美国
起止时间：
2005-07-01 至 2006-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0508471&HistoricalAwards=false
关键词：
Dissertation Research Vegetative Reproduction Explain

项目摘要

Differences in regeneration requirements among species have been the focus of research to explain the high species diversity of tropical forest. However, most studies have concentrated on regeneration strategies related to sexual reproduction, neglecting the contribution of vegetative propagation Even though it has been recognized that a variety of tropical plant species have the potential to reproduce vegetatively, the actual frequency of different modes of reproduction in natural populations remains unknown. Vegetative reproduction can be a particularly important regeneration pathway for small-seeded understory species that have low recruitment success from seeds. The primary goal of this proposal is to determine the relative role that vegetative reproduction plays in the regeneration of species of tropical understory shrubs, and to evaluate the consequences of this mode of reproduction in terms of genetic diversity and mating opportunities. Plants will be mapped and similarities among their genetic fingerprints will be used to distinguish the clones from the genetically distinct individuals in the field. Combining the genetic and the spatial data I will be able to determine dispersion of clones and the frequency of establishment by sexual and vegetative reproduction in the population. This study will improve our understanding of tropical ecology in areas such as colonization, recruitment, gene flow, and population demography and genetics. The support of this grant will provide training in molecular techniques for a Panamanian woman scientist. Furthermore, the database of genetic information, with the geographic locations of individual plants will be made available to the research community to address a myriad of ecological and evolutionary questions, where knowledge of the genotypes and genetic relationships among plants is essential.

物种之间的再生需求差异一直是研究的重点，以解释热带森林的高物种多样性。然而，大多数研究集中在与性繁殖有关的再生策略上，尽管已经认识到，各种热带植物物种具有营养繁殖，但自然种群不同生殖模式的实际频率仍然未知。营养繁殖可能是小种子林下物种的重新生殖途径，这些物种的募集成功率低。该提案的主要目的是确定营养生殖在热带林下灌木的再生中发挥的相对作用，并根据遗传多样性和交配机会评估这种繁殖方式的后果。植物将被映射，其遗传指纹之间的相似性将用于区分克隆与该领域的遗传学个体。结合了遗传学和空间数据，我将能够确定克隆的分散以及人口中性和营养生殖的建立频率。这项研究将提高我们对殖民，募集，基因流以及人群和遗传学等领域中热带生态学的理解。这项赠款的支持将为巴拿马女科学家提供分子技术的培训。此外，遗传信息的数据库以及各个植物的地理位置将提供给研究界，以解决无数的生态和进化问题，其中对植物之间的基因型和遗传关系的了解至关重要。