A Comparative Invesitgation of Hybrid Speciation in Wild Sunflowers

野生向日葵杂交物种形成的比较研究

• 批准号: 9806290
• 负责人: Loren Rieseberg
• 金额: $ 21万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-15 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9806290&HistoricalAwards=false
• 关键词: Comparative; Invesitgation; Hybrid; Speciation; Wild

Rieseberg 9806290 One of the most exciting recent advances in biology has been the ability to generate detailed genetic maps for almost any plant or animal species. These maps not only are essential for isolating genes of interest, but they also can be used to study important questions in population biology such as how new species are formed. The purpose of this grant is to develop genetic linkage maps for three wild sunflower species that are products of hybridization between two other sunflower species. By comparing the genetic maps of the hybrid species and their parents, it will be possible to determine exactly what genetic changes are necessary for hybrid speciation to occur and to estimate how rapidly this process might take place. The primary outcome of this work will be a more predictive theory of hybrid speciation. However, the genetic maps generated by this research are likely to be useful to researchers in a variety of fields ranging from ecology to agriculture. This is because the wild sunflowers to be investigated are characterized by adaptations such as drought and saline tolerance that are of interest to both ecologists and plant breeders. The maps generated by this proposal can be used to elucidate the genomic location and genetic basis of these adaptations and to facilitate their transfer to the cultivated sunflower. In addition, novel analytical methods developed to analyze the sunflower mapping data should be broadly applicable to any data set that involves genetic linkage analyses.

Rieseberg 9806290 生物学领域最近最令人兴奋的进展之一是能够为几乎所有植物或动物物种生成详细的遗传图谱。这些图谱不仅对于分离感兴趣的基因至关重要，而且还可以用于研究群体生物学中的重要问题，例如新物种是如何形成的。 这笔赠款的目的是为三种野生向日葵物种开发遗传连锁图谱，这些物种是其他两种向日葵物种之间杂交的产物。通过比较杂交物种及其亲本的遗传图谱，将有可能准确确定杂交物种形成发生所需的遗传变化，并估计该过程发生的速度。 这项工作的主要成果将是一个更具预测性的混合物种形成理论。 然而，这项研究生成的遗传图谱可能对从生态学到农业等各个领域的研究人员有用。 这是因为要研究的野生向日葵具有耐旱和耐盐等适应能力，生态学家和植物育种者对此都很感兴趣。 该提案生成的图谱可用于阐明这些适应性的基因组位置和遗传基础，并促进它们转移到栽培向日葵上。 此外，为分析向日葵作图数据而开发的新分析方法应广泛适用于涉及遗传连锁分析的任何数据集。