Collaborative Research: Molecular Systematics of the Avian Order Gruiformes

合作研究：鸟类鹤形目分子系统学

• 批准号: 0108656
• 负责人: Carey Krajewski
• 金额: $ 10.14万
• 依托单位: Southern Illinois University at Carbondale
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-15 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0108656&HistoricalAwards=false
• 关键词: Collaborative; Research; Molecular; Systematics; Avian

DEB-0108656Carey W. KrajewskiA collaborative grant has been awarded to Dr. Peter Houde at New Mexico State University and Dr. Carey Krajewski at Southern Illinois University to determine the genealogy of one of the most diverse groups of birds known, the Order Gruiformes. Genealogical relationships of families within the order will be assessed by comparing DNA sequences of several genes. Past patterns of anatomical divergence and geographic origins will be inferred from the pattern by which characteristics of living species have changed genealogically. The ages of major groups will be estimated from levels of difference between their DNA sequences. Individual genes and anatomical characters can provide misleading information about genealogy because of "convergence", so gruiform genealogy will be reconstructed from a large body of independent data, all of which will be evaluated for its consistency with the rest. Subsets of the data that are inconsistent will be scrutinized for functional and developmental correlates. This, in turn, will elucidate processes of convergence between lineages, both at the level of genes and that of anatomy. Gruiformes have singular importance in understanding the timing and geography of bird origins in general, because they are extremely diverse and geographically widespread. Many families appear to be relics of the long bygone Age of Dinosaurs when the continents were arranged quite differently than they are today. Gruiforms present many examples of convergence, providing an unparalleled opportunity for studying the processes that cause it. There is probably no other group of vertebrate animals whose relationships are so poorly understood, yet for which there is a comparable wealth of data on anatomical characteristics. There is also preliminary evidence for convergence at the genetic level, a phenomenon that has barely even been acknowledged in previous research. Thus, this group presents a truly unique opportunity for understanding the correlation between genetic and morphological change through time.

DEB-0108656Carey W.新墨西哥州州立大学的彼得·胡德博士和南伊利诺伊大学的凯里·克拉维斯基博士获得了一笔合作赠款，用于确定已知最多样化的鸟类群体之一--鹤形目的谱系。 通过比较几个基因的DNA序列，将评估该命令内的家庭的系谱关系。 过去的解剖学分歧和地理起源的模式将从模式推断，其中生活物种的特征已经改变了系谱。主要群体的年龄将根据其DNA序列之间的差异程度来估计。 个体基因和解剖特征可能会因为“趋同”而提供有关系谱的误导信息，因此将从大量独立数据中重建gruiform系谱，所有这些数据都将评估其与其他数据的一致性。 将仔细检查不一致的数据子集的功能和发育相关性。 反过来，这将阐明谱系之间的趋同过程，无论是在基因水平还是在解剖学水平。 鹤形目在理解鸟类起源的时间和地理方面具有独特的重要性，因为它们非常多样化，地理分布广泛。 许多家庭似乎是恐龙时代的遗迹，当时大陆的排列与今天大不相同。 鹤形目是许多趋同的例子，为研究导致趋同的过程提供了无与伦比的机会。可能没有其他脊椎动物类群的关系如此不为人所知，但它们的解剖学特征却有着相当丰富的数据。 也有初步证据表明基因水平上的趋同，这是一种在以前的研究中几乎没有被承认的现象。 因此，这一组提供了一个真正独特的机会，了解遗传和形态变化之间的相关性，随着时间的推移。