Genetics of Reaction Norms of Arabidopsis

拟南芥反应规范的遗传学

• 批准号: 9220593
• 负责人: Carl Schlichting
• 金额: $ 10.69万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-01 至 1995-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220593&HistoricalAwards=false
• 关键词: Genetics; Reaction; Norms; Arabidopsis

Plants' responses to changes in their environments may be crucial for survival and reproduction, particularly under stressful conditions. The term 'reaction norm' refers to the responses of an organism (actual and potential) to environmental variation. The nature of these responses to the environment is under genetic control, and there are several ways that control can be manifested. The form of the genetic control is important because it will determine whether selection, either in the wild or in agriculture, can alter the ways that plants respond to changes in environmental factors such as light, water, nutrients or herbivores. The experiments being undertaken will reveal the genetic components of response to a gradient in soil nutrients, using a model plant system, Arabidopsis thaliana. In addition, we will impose a regime of artificial selection on Arabidopsis populations to determine the ability of these plants to alter their reaction norms, that is, to change their abilities to respond to changes in the level of nutrients. The results of these two sets of experiments will provide a better understanding of the genetic determination of reaction norms, and of how selection may operate to change reaction norms. Such an understanding may become increasingly important as we try to evaluate the impact of global environmental change on both wild and agricultural plant species.

植物对环境变化的反应对于生存和繁殖可能至关重要，尤其是在压力条件下。 术语“反应规范”是指生物体（实际和潜力）对环境变化的反应。 这些对环境的反应的性质在遗传控制之下，可以表现出几种控制的方式。 遗传控制的形式很重要，因为它将确定在野外还是在农业中的选择是否可以改变植物对环境因素（如光，水，营养或食草动物）的反应方式。 进行的实验将揭示使用模型的植物系统拟南芥的遗传成分对土壤养分中梯度的反应。 此外，我们将对拟南芥种群实施人工选择的制度，以确定这些植物改变其反应规范的能力，即改变其能力，以应对营养水平的变化。 这两组实验的结果将更好地了解反应规范的遗传确定，以及选择如何操作以改变反应规范的方法。 当我们试图评估全球环境变化对野生和农业植物物种的影响时，这种理解可能变得越来越重要。