The Genetic Architecture of Specialization and Isolation Between Divergent Populations

不同群体之间专业化和隔离的遗传结构

• 批准号: 9629081
• 负责人: Sara Via
• 金额: $ 7.5万
• 依托单位: Cornell Univ - State: AWDS MADE PRIOR MAY 2010
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-11-01 至 1997-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9629081&HistoricalAwards=false
• 关键词: Genetic; Architecture; Specialization; Isolation; Between

9629081 Via A basic process generating biological diversity is speciation, when populations of one species diverge and eventually become separate species. The genetic changes that produce population divergence and speciation are poorly known. The goal of this project is to determine the number and effects of genes that influence divergence between populations of a single insect species, pea aphid, that infests two host plants. Pea aphid populations on alfalfa and clover are highly genetically divergent and significantly isolated due to habitat choice, and so appear to be incipient species. Quantitative trait loci (QTLs) influencing host plant choice and survival and fertility on each host plant will be mapped on chromosomes using molecular linkage map analysis, as well as biometrical analyses. Studying the genetic basis for speciation is fundamental for understanding the generation of species biodiversity. It is also useful for understanding how pests adapt to new hosts, and how much gene flow there can be between related pest species.

9629081 Via 产生生物多样性的基本过程是物种形成，即一个物种的种群分化并最终成为单独的物种。 导致种群分化和物种形成的基因变化却鲜为人知。 该项目的目标是确定影响感染两种寄主植物的单一昆虫物种豌豆蚜种群之间差异的基因数量和影响。 苜蓿和三叶草上的豌豆蚜种群在遗传上高度分化，并且由于栖息地的选择而显着隔离，因此似乎是早期物种。 将使用分子连锁图分析以及生物统计分析将影响寄主植物选择以及每个寄主植物的存活和育性的数量性状基因座（QTL）映射到染色体上。 研究物种形成的遗传基础对于理解物种生物多样性的产生至关重要。 它还有助于了解害虫如何适应新宿主，以及相关害虫物种之间有多少基因流动。