Allochronic speciation, reproductive character displacement, and sexual selection in periodical cicadas (Magicicada spp)

周期性蝉（Magicicada spp）的异时物种形成、生殖特征位移和性选择

• 批准号: 9982039
• 负责人: Chris Simon
• 金额: $ 27万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-05-01 至 2004-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9982039&HistoricalAwards=false
• 关键词: Allochronic; speciation; reproductive; character; displacement

Simon9982039Unique biogeographic patterns and life history traits of periodical cicadas have brought about extraordinary speciation events and species relationships. Each synchronized periodical cicada emergence was thought to contain up to three species: 13-year Magicicada tredecim, Magicicada tredecassini and Magicicada tredecula; or 17-year Magicicada septendecim, Magicicada cassini, and Magicicada septendecula. Our genetic, biogeographical and behavioral research led to the 1998 discovery of a new species with a 13-year life cycle, Magicicada neotredecim. This new species appears to have originated from a similar species with a 17- year life cycle. Magicicada neotredecim is divided into two major geographic groups that emerge in different years; thus, although Magicicada neotredecim last emerged in 1998, another population will emerge in 2002. During the next emergence, species distributions will be mapped, samples for genetic analysis obtained, the potential for interbreeding assessed, and the effect of interspecific interactions on mating behaviors evaluated.Study of Magicicada neotredecim and its interactions with other similar species provides valuable information about this unique species complex, the mechanisms by which life cycles change, and the ways in which populations of the same life cycle become asynchronous. The understanding of these mechanisms will provide general insights into the speciation process and the maintenance of species boundaries, both important foci of modern evolutionary biology.

Simon 9982039周期蝉独特的地理分布模式和生活史特征导致了异常的物种形成事件和物种关系。 每一个同步的周期性的出现被认为包含多达三个物种：13年的Magicada tredecim，Magicada tredecassini和Magicicada tredecula;或17年的Magicada septendecim，Magicicada cassini和Magicicada septendecula。 我们的遗传学、地理学和行为学研究导致了1998年发现了一个生命周期为13年的新物种，Magicicada neotredecim。 这一新物种似乎起源于一个生命周期为17年的类似物种。 Magicicada neotredecim分为两个主要的地理群体，出现在不同的年份;因此，虽然Magicada neotredecim最后一次出现在1998年，但另一个种群将在2002年出现。 在下一次出现期间，将绘制物种分布图，获得用于遗传分析的样本，评估杂交的潜力，并评估种间相互作用对交配行为的影响。Magicicada neotredecim及其与其他相似物种的相互作用的研究提供了有关这个独特的物种复合体、生命周期变化的机制、以及同一生命周期的种群变得异步的方式。 对这些机制的理解将为物种形成过程和物种边界的维持提供一般性的见解，这两者都是现代进化生物学的重要焦点。