Admixture and hybridization in North American cattails (Typha spp.)

北美香蒲（香蒲属）的混合和杂交

• 批准号: 229737-2012
• 负责人: Freeland, Joanna
• 金额: $ 1.89万
• 依托单位: Trent University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=524240
• 关键词: Admixture; hybridization; North; American; cattails

Every year hundreds - possibly thousands - of species are either accidentally or intentionally moved around the world. Most species are unable to survive in the new environments to which they are introduced. However, for reasons that are not well understood, a few introduced species fare extraordinarily well and become invasive species that dominate new habitats, drive native species to extinction, and cost millions of dollars in eradication programs. Introductions that lead to biological invasions do not have to involve species that are new to a particular geographical area: invasions can also result from the introduction of new genetic varieties of a native species. This can happen if populations from a single species naturally occur in geographically separated areas, such as the Canadian maritime provinces and British Columbia. In this example, the eastern and western Canadian populations of a single species have been isolated from one another for thousands of years, during which time they evolved into eastern and western varieties with distinct genetic lineages, even though they are still considered members of a single species. If individuals from British Columia find their way to the maritime provinces, they could potentially become invasive in their new habitat.

每年都有数百种--可能是数千种--物种意外或故意地在世界各地迁徙。大多数物种无法在它们被引入的新环境中生存。然而，由于一些不太清楚的原因，一些引进的物种表现得非常好，成为了入侵物种，主导了新的栖息地，导致本土物种灭绝，并花费了数百万美元的根除计划。导致生物入侵的引进不一定涉及特定地理区域的新物种：入侵也可能是引入本地物种的新遗传变种造成的。如果单一物种的种群自然出现在地理上分离的地区，如加拿大沿海省份和不列颠哥伦比亚省，就可能发生这种情况。在这个例子中，加拿大东部和西部的单一物种的种群已经相互隔离了数千年，在此期间，他们进化成具有不同遗传谱系的东部和西部品种，尽管他们仍然被认为是单一物种的成员。如果来自不列颠哥伦比亚省的个体找到了前往沿海省份的途径，它们可能会在新的栖息地变得入侵。