Dissertation Research: A Comparative Analysis of Two Orthopteran Hybrid Zones

论文研究：两个直翅目杂种区的比较分析

• 批准号: 9321453
• 负责人: Douglas Futuyma
• 金额: $ 0.9万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-03-15 至 1995-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9321453&HistoricalAwards=false
• 关键词: Dissertation; Research; Comparative; Analysis; Two

9321453 Futuyma Hybrid zones are areas in which two genetically distinct groups (e.g., "species") successfully reproduce with each other to at least a limited extent. The study of hybrid zones allows us to learn about the mechanisms of reproductive isolation and their evolution, an understanding of which is critical to our understanding of speciation. According to the most widely accepted species definition, two groups of organisms that are not interfertile belong to two different species. Hybrid zones represent an intermediate stage of speciation, with limited gene flow between the "species": the two groups are neither completely interfertile nor completely reproductively isolated. This intermediate situation provides a unique opportunity for biologists to apply analytical techniques developed for the study of single species population--techniques that cannot be used in the total absence of gene flow--to improve our understanding of how new species develop. This study will take the nearly unique approach of comparing two geographically well separated hybrid zones involving the same two " species". Patterns of variation in behavior, morphology, proteins, DNA, and chromosomes will be compared across the hybrid zones. By combining this information with information about the differing ecology and history of contact between the two "species" in each zone, this research will improve understanding of how ecology and history may influence patterns of interactions between incompletely isolated taxa. The research will also produce insight into the circumstances under which hybridizing groups may evolve into reproduc tively isolated species. In addition to such inferences that may emerge from this study (which would then require testing in other contact zones), the basic information gathered to describe the hybrid zones will permit detailed studies addressing a variety of questions in the future, as well as the tracking of the two zones through time. U W U E G I K M O Q S U W ! ! ! F W W ( Times New Roman Symbol & Arial j j j j " h # EL* eL* e u # 7 Crystal Blackshear Crystal Blackshear

9321453 Futuyma 杂交区是两个遗传上不同的群体（例如“物种”）至少在有限程度上成功地相互繁殖的区域。 对混合区的研究使我们能够了解生殖隔离的机制及其进化，了解这一点对于我们理解物种形成至关重要。 根据最广泛接受的物种定义，两组不互育的生物体属于两个不同的物种。 杂交区代表物种形成的中间阶段，“物种”之间的基因流动有限：这两个群体既不是完全互育，也不是完全生殖隔离。 这种中间情况为生物学家提供了一个独特的机会，可以应用为研究单一物种种群而开发的分析技术（这些技术在完全没有基因流的情况下无法使用），以提高我们对新物种如何发展的理解。 这项研究将采用近乎独特的方法来比较两个地理上分离的、涉及相同两个“物种”的混合区域。 将比较不同杂交区域的行为、形态、蛋白质、DNA 和染色体的变异模式。 通过将这些信息与每个区域中两个“物种”之间的不同生态和接触历史的信息相结合，这项研究将加深对生态和历史如何影响不完全孤立的类群之间相互作用模式的理解。 该研究还将深入了解杂交群体在何种情况下可能进化成可繁殖的孤立物种。 除了本研究可能得出的推论（随后需要在其他接触区域进行测试）之外，收集到的用于描述混合区域的基本信息将允许进行详细研究，以解决未来的各种问题，以及随着时间的推移跟踪这两个区域。 U W U E G I K M O Q S U W！ ！ ！ F W W ( Times New Roman Symbol & Arial j j j j " h # EL* eL* e u # 7 Crystal Blackshear Crystal Blackshear