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Evolution of Ecophysiological Traits in a Species of Hybrid Origin, Helianthus Anomalus

杂交起源物种向日葵生态生理特征的进化

基本信息

批准号：
0131078
负责人：
Lisa Donovan
金额：
$ 35万
依托单位：
University of Georgia Research Foundation Inc
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2002
资助国家：
美国
起止时间：
2002-02-01 至 2006-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0131078&HistoricalAwards=false
关键词：
Evolution Ecophysiological Traits Species Hybrid

项目摘要

Understanding the relationship between plant traits and plant performance is a fundamental goal of both basic and applied plant sciences. This research will determine the relationship between plant traits and performance (survival and reproductive output) for a wild sunflower species of hybrid origin (Helianthus anomalous) and early generation hybrids of its ancestral parents (Helianthus annuus and Helianthus petiolaris). We are interested in plant traits related to water use, photosynthetic carbon gain, growth, survival, and reproductive output. The hybrid species complex provides a unique opportunity to look at how these traits are evolving to improve the fitness of the hybrids in a desert dune environment, and what trait combinations are associated with maximum performance in this water and nutrient limited environment. The analyses will include a) experimental gardens to show which plants do best in environments on and off the dunes, b) phenotypic selection experiments to determine which traits account for better performance, and c) selection experiments to determine whether or not there is heritable genetic variation for these traits in Helianthus. This research will further our understanding of how wild plants adapt to harsh environments and identify traits that may be useful for development of stress tolerant line of commercial Helianthus annuus.

了解植物性状和植物性能之间的关系是基础和应用植物科学的基本目标。本研究将确定植物性状和性能（生存和繁殖输出）的野生向日葵品种的杂交起源（向日葵异常）和其祖先的父母（向日葵annuus和向日葵petiolaris）的早期世代的杂交种之间的关系。我们感兴趣的是与水分利用，光合碳增益，生长，生存和繁殖产量有关的植物性状。杂交种复合体提供了一个独特的机会，看看这些性状是如何演变，以提高在沙漠沙丘环境中的杂种的适应性，以及什么性状组合与最大性能在这个水和养分有限的环境。分析将包括a）实验花园，以显示哪些植物在沙丘上和沙丘外的环境中表现最好，B）表型选择实验，以确定哪些性状表现更好，以及c）选择实验，以确定向日葵中这些性状是否存在可遗传的遗传变异。这项研究将进一步了解野生植物如何适应恶劣的环境，并确定可能有助于开发商业向日葵耐胁迫品系的性状。