Theoretical Studies in Ecological and Population Genetics

生态与群体遗传学理论研究

• 批准号: 9210895
• 负责人: Marjorie Asmussen
• 金额: $ 20万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-01 至 1997-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9210895&HistoricalAwards=false
• 关键词: Theoretical; Studies; Ecological; Population; Genetics

Recent population studies show that joint nuclear-cytoplasmic surveys allow unique inferences about many important evolutionary processes. This special utility derives from the fact that genes in the nucleus are inherited through both parents, while an organism's cytoplasmically-housed genes, such as those in mitochondria and chloroplasts, are usually inherited solely through the mother. As a result of this asymmetrical transmission, a population's joint nuclear-cytoplasmic makeup can provide a new way for detecting zones of genetic admixture between two populations, and for unraveling the relative amounts of pollen and seed dispersion in plant populations. The proposed research will develop the necessary theoretical framework for unlocking the novel information encoded by nuclear-cytoplasmic data in these and other important evolutionary contexts. The practical utility of these new approaches will be demonstrated by direct applications to a variety of recent data sets. A parallel line of research will provide a conceptual framework for understanding the fundamental question of how and why cytoplasmic inheritance patterns evolve through time. This seminal theoretical study is motivated by the growing number of cases in which mitochondria and chloroplasts are inherited through the father or both parents, instead of solely through the mother. Moreover, the pattern of inheritance may evolve through time under the control of nuclear or cytoplasmic genes within the parents or progeny. These exciting experimental discoveries will form the basis of an extensive series of models designed to delimit the conditions favoring evolution among the three cytoplasmic inheritance patterns, and answer the critical and intriguing question of why strict maternal transmission now seems to predominate.

最近的群体研究表明， 调查允许关于许多重要的进化的独特的推论 流程. 这种特殊的效用来自于这样一个事实， 细胞核中的基因是通过父母双方遗传的，而 细胞质中的基因，如 线粒体和叶绿体，通常只通过 母亲 由于这种不对称传输， 种群的核质联合构成可以提供一种新的方式 为了检测两个种群之间的遗传混合区， 以及花粉和种子的相对数量 在植物种群中的扩散。 拟议的研究将 发展必要的理论框架来解开小说 这些和其他细胞核-细胞质数据编码的信息 重要的进化背景。 这些的实际效用 新方法将通过直接应用于 最近的各种数据集。 一条平行的研究路线将 提供一个概念性的框架， 细胞质遗传模式如何以及为何进化的问题 穿越时空 这一开创性的理论研究的动机是 越来越多的情况下，其中线粒体和叶绿体是 通过父亲或父母双方继承，而不是单独继承 通过母亲。 此外，遗传模式可能 在细胞核或细胞质的控制下进化 父母或后代中的基因。 这些令人兴奋的实验 这些发现将构成一系列广泛模型的基础 旨在划定有利于进化的条件， 三种细胞质遗传模式，并回答了关键和 为什么严格的母婴传播现在看来 占主导地位。