A Comparative Invesitgation of Hybrid Speciation in Wild Sunflowers

里瑟贝格 9806290 生物学最令人兴奋的最新进展之一是， 为几乎所有的植物或动物物种绘制详细的基因图谱。这些 图谱不仅对分离感兴趣的基因至关重要，而且 可以用来研究种群生物学中的重要问题，比如 新的物种正在形成。 这项资助的目的是发展遗传学， 三个野生向日葵物种的连锁图谱， 两种向日葵杂交而成。通过比较基因 杂交物种及其父母的地图，将有可能 确定杂交物种形成所必需的基因变化 并估计这一过程可能发生的速度。 这项工作的主要成果将是一个更具预测性的混合理论， 物种形成 然而，这项研究产生的基因图谱很可能是 对从生态学到 农业 这是因为要调查的野生向日葵是 以适应性为特征，如耐旱和耐盐， 生态学家和植物育种家都感兴趣的。 生成的地图 这一建议可用于阐明基因组定位和遗传 这些调整的基础，并促进其转移到 栽培向日葵。 此外，开发了新的分析方法， 分析向日葵映射数据应广泛适用于任何数据 一套涉及遗传连锁分析。

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.