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

合作研究：数量性状位点（QTL）和亲本对拟南芥季节性休眠影响的田间选择研究

• 批准号: 0079489
• 负责人: Carol Baskin
• 金额: $ 22.76万
• 依托单位: University of Kentucky Research Foundation
• 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 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0079489&HistoricalAwards=false
• 关键词: Collaborative; Research; Quantitative; 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.

种子发芽的季节性时间可能对植物的生存和繁殖产生至关重要的影响。 在许多植物物种中，季节性种子休眠和发芽时间受到亲本植物经历的环境的强烈影响。本研究将研究一年生杂草拟南芥（一种广泛用于分子遗传学研究的物种）种子休眠的遗传控制以及亲本环境对休眠的影响。遗传图谱将识别与季节性休眠、亲本环境影响和田间条件下的适应性变化相关的染色体区域（数量性状基因座或 QTL）。对亲本日长和季节性发芽环境的实验操作将研究亲本环境对季节性休眠的影响如何影响田间的生存和繁殖。 这项研究将是首批鉴定与季节性休眠、亲本效应和自然条件下适应性相关的基因的研究之一。 它将为拟南芥发育的众多分子遗传学研究提供重要的生态背景。 研究结果将阐明植物特性的分子基础和生态背景，这些特性对于可变环境中的生存和性能至关重要。 对环境信号的适当发芽反应可能有助于植物种群在可变环境中的持久存在或扩展到新的栖息地。因此，这项研究的结果将有助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。