The Genetic Basis of Rosette Flowering in Leavenworthia

莱文沃斯莲座丛开花的遗传基础

• 批准号: 0641428
• 负责人: David Baum
• 金额: --
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0641428&HistoricalAwards=false
• 关键词: Genetic; Basis; Rosette; Flowering; Leavenworthia

Knowledge of how changes at the genetic level cause species to have different features is still rudimentary. The proposed research will elucidate the genes responsible for differences in the architecture of wild relatives of cabbage (Brassicaceae). The genetic model species Arabidopsis thaliana produces flowers on an elongated portion of stem called an inflorescence. In contrast, species of Leavenworthia produce flowers on long stalks directly from the cluster of leaves close to the ground, the rosette. Prior NSF funded research has suggested that a gene called LFY changed during the evolution of Leavenworthia and that it may have played a role in the evolution of rosette flowering from inflorescence flowering. The proposed research we will further test this hypothesis by isolating the LFY gene from other rosette flowering and inflorescence flowering species and introducing them into A. thaliana. Additionally, other candidate genes that plausibly contributed to the evolution of rosette flowering will be studied. The characteristics of A. thaliana plants that contain single or multiple Leavenworthia genes we be used to determine which sets of genes played the most important role in architectural evolution. Lastly, the researchers will begin developing techniques for introducing genes into Leavenworthia, thereby allowing more powerful experimental tests to be used in the future. By clarifying the genetic basis of architectural evolution in Brassicaceae, the research will enhance understanding of basic principles of plant development. This information may help plant breeders more effectively manipulate crop plants and will provide insights into general mechanisms of developmental evolution. Additionally, the research program will provide valuable research opportunities for undergraduates and one minority graduate student.

关于基因水平上的变化如何导致物种具有不同特征的知识仍然是初步的。拟议的研究将阐明导致卷心菜（甘蓝科）野生亲缘植物结构差异的基因。 遗传模式物种拟南芥在茎的一个被称为花序的伸长部分上产生花朵。 与此相反，Leavenoproia的种类直接从靠近地面的叶子簇（莲座丛）上长柄开花。 此前NSF资助的研究表明，一个名为LFY的基因在Leavenoprolia的进化过程中发生了变化，它可能在从花序开花到莲座花开花的进化中发挥了作用。 本研究将进一步验证这一假设，从其它莲座花和花序花植物中分离LFY基因，并将其导入A。thaliana. 此外，还将研究其他可能有助于莲座丛开花进化的候选基因。 对A.我们可以使用含有单个或多个Leavenoproia基因的拟南芥植物来确定哪组基因在结构进化中起着最重要的作用。 最后，研究人员将开始开发将基因引入Leavenglycia的技术，从而允许将来使用更强大的实验测试。 通过阐明菊科植物构型进化的遗传基础，有助于加深对植物发育基本规律的认识。 这些信息可能有助于植物育种者更有效地操纵作物，并将提供深入了解发育进化的一般机制。 此外，该研究计划将为本科生和一名少数民族研究生提供宝贵的研究机会。