Collaborative Proposal: Genetic architecture of reproductive isolation and introgression in experimental and natural hybrid zones in Louisiana Irises

合作提案：路易斯安那鸢尾实验区和自然杂交区生殖隔离和基因渗入的遗传结构

• 批准号: 0949479
• 负责人: Michael Arnold
• 金额: $ 40.81万
• 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: 2010
• 资助国家: 美国
• 起止时间: 2010-03-01 至 2014-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0949479&HistoricalAwards=false
• 关键词: Collaborative; Proposal; Genetic; architecture; reproductive

The interplay of genetic exchange and reproductive isolation is central to the origin and maintenance of adaptation and biodiversity. Ultimately, biological diversification involves speciation, which occurs when reproductive isolation results from development of barriers to interbreeding, such as selective mating or hybrid sterility. Reproductive barriers lead to relatively infrequent interbreeding and hybrid formation, but the production of hybrids still can have important evolutionary implications, particularly when hybrids mate with their parent taxa. Mating between hybrids and their parent taxa can lead to the transfer of important genetically-based adaptations (e.g., traits such as tolerance to flooded conditions) between the parent species through genetic introgression. This project will apply a new technique that allows very fine-scale analysis of the genome to study speciation that is accompanied by introgression between two species of Louisiana Irises in order to determine how the genes underlying reproductive barriers affect introgression.This project will contribute to understanding of mechanisms of biodiversity increase and adaptation and will advance applications of new molecular genetic techniques. This project will provide training for undergraduate, graduate, and postdoctoral researchers at two universities and will provide scientific information to the public. This research into the process of introgression is directly applicable to the selective breeding of microorganisms, plants, and animals upon which humans depend for food, clothing, and shelter.

遗传交换和生殖隔离的相互作用对于适应和生物多样性的起源和维持至关重要。最终，生物多样化涉及物种，这是在生殖隔离因障碍物到杂交（例如选择性交配或杂交不育）而产生的时发生的。生殖障碍会导致相对频繁的杂交和杂种形成，但是杂种的产生仍然可以具有重要的进化含义，尤其是当混合体与母体分类群交配时。杂种及其母体分类单元之间的交配可以导致基于遗传的适应（例如，诸如对洪水泛滥条件的特征）通过遗传渗入之间的转移。 该项目将采用一种新技术，可以对基因组进行非常精细的分析来研究形成，并伴随着两​​种路易斯安那州虹膜之间的侵入性，以确定生殖障碍的基因如何影响渗入。该项目将有助于了解生物多样性的增长，并促进新的分类技术的机理理解。该项目将为两所大学的本科，研究生和博士后研究人员提供培训，并将向公众提供科学信息。这项对渗入过程的研究直接适用于人类依赖食物，衣服和庇护所的微生物，植物和动物的选择性繁殖。