DISSERTATION RESEARCH: Species Boundaries and Phylogenetic Relationships in Chromosome Races of the Sceloporus grammicus Complex (Squamata).
论文研究:Sceloporus grammicus 复合体(Squamata)染色体种族的物种边界和系统发育关系。
基本信息
- 批准号:0309103
- 负责人:
- 金额:$ 1.2万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2003
- 资助国家:美国
- 起止时间:2003-06-15 至 2004-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
A grant has been awarded from the National Science Foundation to Dr. Jack Sites and Mr. Jonathon Marshall, Brigham Young University, to study "Species boundaries and phylogenetic relationships of chromosome races of lizards of the Sceloporus grammicus complex in central Mexico." These lizards represent one of the most chromosomally variable of all non-mammalian vertebrate groups, and they have been described as textbook examples of how chromosomal mutations may facilitate the speciation process. Dr. Sites has spent over two decades of his research career studying speciation mechanisms in this group, and has accumulated a sufficiently large data base to make these lizards a "model system" for selected kinds of research. The objective of this study will be to test species boundaries across the eight chromosome 'races' known from central Mexico, using a minimum of four different methodologies. This will be accomplished by analyzing three different kinds of genetic markers, chromosomes, enzyme products analyzed by gel electrophoresis, and DNA sequences from three gene regions. Concordance among methods and data sets will be used to infer species boundaries, which should allow determination of causes for any possible conflicts among methods. This study has broad implications in the following context. Two frequently stated objectives of systematic biology are to: (1) discover the major 'natural groups' (= clades) of living species and how these are related, and (2) to discover species. The literature in systematic biology is very large with respect to theory and methods of tree-reconstruction to accomplish objective 1, but it is surprising limited with respect to objective 2, although the issue of delimitation of species is now getting increased attention. To date only a single study has been published comparing the performance of several methods (three), but the data set was limited, and Sites and Marshall can capitalize on the large data base for the S. grammicus complex to go far beyond anything previously attempted, and to contribute to the larger debate on delimiting species.
美国国家科学基金会向杨百翰大学的杰克·塞斯博士和乔纳森·马歇尔先生提供了一笔赠款,用于研究“墨西哥中部Sceloporus grammicus复合体蜥蜴染色体种族的物种界限和系统发育关系。“这些蜥蜴代表了所有非哺乳动物脊椎动物群体中染色体变异最多的群体之一,它们被描述为染色体突变如何促进物种形成过程的教科书例子。Sites博士花了20多年的研究生涯来研究这一群体的物种形成机制,并积累了足够大的数据库,使这些蜥蜴成为选定研究的“模型系统”。 这项研究的目的是测试物种的边界在8个染色体的“种族”已知从墨西哥中部,使用至少四种不同的方法。 这将通过分析三种不同类型的遗传标记、染色体、凝胶电泳分析的酶产物和来自三个基因区域的DNA序列来完成。 方法和数据集之间的一致性将用于推断物种界限,这应有助于确定方法之间任何可能冲突的原因。 这项研究在以下方面具有广泛的影响。系统生物学的两个经常提到的目标是:(1)发现生物物种的主要“自然群”(=进化枝)以及它们之间的关系,(2)发现物种。 在系统生物学中,关于实现目标1的树重建的理论和方法的文献非常多,但关于目标2的文献却令人惊讶地有限,尽管物种划界的问题现在越来越受到关注。 迄今为止,只有一项研究比较了几种方法的性能(三种),但数据集有限,Sites和马歇尔可以利用S. grammicus复合体远远超出了以前的任何尝试,并有助于更大的辩论界定物种。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Jack Sites其他文献
Jack Sites的其他文献
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{{ truncateString('Jack Sites', 18)}}的其他基金
DISSERTATION RESEARCH: Lizards of the Family Teiidae: phylogeny, historical biogeography, and continental-scale species delimitation
论文研究:蜥蜴科蜥蜴:系统发育、历史生物地理学和大陆范围物种界定
- 批准号:
1601062 - 财政年份:2016
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$ 1.2万 - 项目类别:
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论文研究:Liolaemus montanus 群的系统发育和 L.Robustus 分支(Squamata、Liolaemidae)的高分辨率物种界定。
- 批准号:
1501187 - 财政年份:2015
- 资助金额:
$ 1.2万 - 项目类别:
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DISSERTATION RESEARCH: Phylogeny, biogeography, and convergent evolution in a radiation of Southeast Asian Rock Geckos (Cnemaspis Strauch, 1887).
论文研究:东南亚岩壁虎辐射区的系统发育、生物地理学和趋同进化(Cnemaspis Strauch,1887)。
- 批准号:
1501198 - 财政年份:2015
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Collaborative Research: Quantifying Climate-forced Extinction Risks for Lizards, Amphibians, Fishes, and Plants
合作研究:量化气候迫使蜥蜴、两栖动物、鱼类和植物灭绝的风险
- 批准号:
1241885 - 财政年份:2013
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DISSERTATION RESEACH: Diversification in the South American "dry diagonal" biomes: Distribution modeling and multilocus comparative phylogeography in three co-distributed species
论文研究:南美“干对角线”生物群落的多样化:三个共同分布物种的分布模型和多位点比较系统发育地理学
- 批准号:
1210346 - 财政年份:2012
- 资助金额:
$ 1.2万 - 项目类别:
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ATOL: The Deep Scaly Project: Resolving Squamate Phylogeny Using Genomic and Morphological Approaches
ATOL:深鳞项目:使用基因组和形态学方法解决鳞类系统发育
- 批准号:
0334966 - 财政年份:2004
- 资助金额:
$ 1.2万 - 项目类别:
Continuing Grant
DISSERTATION RESEARCH: Phylogeny of the Genus Microlophus (Squamata: Tropiduridae): A History of Colonization and Dispersal
论文研究:Microlophus 属(有鳞目:Tropiduridae)的系统发育:定殖和扩散的历史
- 批准号:
0309111 - 财政年份:2003
- 资助金额:
$ 1.2万 - 项目类别:
Standard Grant
Dissertation Research: Limb Loss And Phylogenetic Relationships In Southern African Scincine Lizards
论文研究:南部非洲 Scincine 蜥蜴的肢体丧失和系统发育关系
- 批准号:
0206362 - 财政年份:2002
- 资助金额:
$ 1.2万 - 项目类别:
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The Phylogeny of Xantusiidae, and its Placement with Scleroglossa (Reptilia: Squamata)
Xantusiidae 的系统发育及其与 Scleroglossa 的位置(爬行纲:Squamata)
- 批准号:
0132227 - 财政年份:2002
- 资助金额:
$ 1.2万 - 项目类别:
Standard Grant
CRB: Population Structure, Nest-site fidelity, and Conservation Genetics in the Giant Amazon River Turtle (Podocemis expansa; Pelomedusidae)
CRB:亚马逊河巨龟(Podocemis expansa;Pelomedusidae)的种群结构、巢址保真度和保护遗传学
- 批准号:
9815881 - 财政年份:1999
- 资助金额:
$ 1.2万 - 项目类别:
Standard Grant
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