Collaborative Research: Quantiative Trait Loci (QTL) and Field Selection Studies of Parental Effects on Seasonal Dormancy in Arabidopsis thaliana

合作研究：亲本对拟南芥季节性休眠影响的数量性状位点（QTL）和田间选择研究

• 批准号: 0079932
• 负责人: Lisa Dorn
• 金额: $ 22.84万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0079932&HistoricalAwards=false
• 关键词: Collaborative; Research; Quantiative; Trait; Loci

The seasonal timing of seed germination may have critical consequences for plant survival and reproduction. In many plant species, seasonal seed dormancy and germination timing are strongly influenced by the environment experienced by the parental plant. This study will investigate the genetic control of seed dormancy and parental environmental effects on dormancy in the annual weed Arabidopsis thaliana, a species widely used for molecular genetic studies. Genetic mapping will identify chromosomal regions (quantitative trait loci or QTL) associated with variation in seasonal dormancy, parental environmental effects, and fitness under field conditions. Experimental manipulation of parental day length and the seasonal germination environment will investigate how parental environmental effects on seasonal dormancy influence survival and reproduction in the field. This study will be among the first to identify genes associated with seasonal dormancy, parental effects, and fitness under natural conditions. It will provide an important ecological context for numerous molecular genetic studies of development in A. thaliana. The results will elucidate the molecular basis and ecological context of a plant character crucial to survival and performance in variable environments. Appropriate germination responses to environmental cues may contribute to the persistence of plant populations in a variable environment or their expansion into novel habitats. The results of this study will be therefore be relevant for understanding the evolutionary dynamics of agricultural weeds and invasive plant species, as well as the management of rare or endangered plant populations in changing environments.

种子萌发的季节性时间可能对植物的生存和繁殖产生重要影响。 在许多植物物种中，季节性种子休眠和萌发时间受到亲本植物所经历的环境的强烈影响。本研究将探讨种子休眠的遗传控制和休眠的一年生杂草拟南芥，广泛用于分子遗传学研究的物种亲本环境的影响。遗传作图将确定染色体区域（数量性状基因座或QTL）与季节性休眠，亲本环境影响，并在田间条件下的健身变化。实验操纵父母的白天长度和季节性发芽环境将调查如何父母的环境影响季节性休眠影响生存和繁殖领域。 这项研究将是第一个确定与季节性休眠，亲本效应和自然条件下的健身相关的基因。 这将为大量的分子遗传学研究提供重要的生态学背景。thaliana. 这些结果将阐明植物特征的分子基础和生态背景，这些特征对在多变的环境中生存和表现至关重要。 适当的发芽反应的环境线索可能有助于持久的植物种群在一个可变的环境或其扩展到新的栖息地。因此，这项研究的结果对于了解农业杂草和入侵植物物种的进化动态以及在不断变化的环境中管理稀有或濒危植物种群具有重要意义。