Ecological and evolutionary implications of haploid gene expression

单倍体基因表达的生态和进化意义

• 批准号: 331127-2006
• 负责人: Jesson, Linley
• 金额: $ 2.91万
• 依托单位: University of New Brunswick
• 依托单位国家: 加拿大
• 项目类别: University Faculty Award
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=363910
• 关键词: Ecological; evolutionary; implications; haploid; gene

Plants display an amazing diversity of sexual forms, which can be expressed at different life stages. The moss plant growing on the forest floor is genetically equivalent to a pollen grain in flowering plants. Why does the expression of the dominance of these life stages differ so much between plants? What are the consequences of sex and self fertilization? My research examines the evolutionary and ecological consequences of the variation in sexual diversity at different life stages in mosses and angiosperms. Understanding the factors that influence this sexual diversity requires integration of ecological genetics, mathematical theory and comparative biology.  For example, sexual organisms may be hermaphrodite or have separated sexes. Models derived for animals and seed plants suggest that inbreeding and resources influence whether sexes are separate or combined.  I will use mosses as a novel model system to extend these models and test their generality.  In addition, in flowering plants I will examine the effect of self-fertilisation on interactions between pollen grains and the maternal plant. This research will provide information on the factors selecting for the diversity in the expression of sexual conditions in plants, and has applications for conservation biology, plant breeding, and biotechnology.

植物显示出惊人的多样性的性形式，可以在不同的生命阶段表达。生长在森林地面上的苔藓植物在遗传上相当于开花植物中的花粉粒。为什么这些生命阶段的优势表达在植物之间差异如此之大？性行为和自我受精的后果是什么？我的研究探讨了苔藓和被子植物不同生命阶段性多样性变化的进化和生态后果。要了解影响这种性别多样性的因素，需要结合生态遗传学、数学理论和比较生物学，例如，有性生物可能是雌雄同体或两性分离。动物和种子植物的模型表明，近亲繁殖和资源的影响是否性别是分开的或combined.I将使用苔藓作为一种新的模式系统，以扩展这些模型，并测试其generalization.In此外，在开花植物，我将检查花粉粒和母体植物之间的相互作用的自花受精的效果。这项研究将提供有关植物性条件表达多样性的选择因素的信息，并在保护生物学，植物育种和生物技术方面具有应用价值。