DISSERTATION RESEARCH: The role of the Z-chromosome in the reproductive isolation of Passerina buntings (Aves: Cardinalidae)

论文研究：Z 染色体在雀形目鹀（鸟纲：红雀科）生殖隔离中的作用

基本信息

批准号：
0808464
负责人：
Robb Brumfield
金额：
$ 1.2万
依托单位：
Louisiana State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2008
资助国家：
美国
起止时间：
2008-07-01 至 2009-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0808464&HistoricalAwards=false
关键词：
DISSERTATION RESEARCH role chromosome reproductive

项目摘要

Studies of hybridization between model organisms have been extremely important to our understanding of the formation of new species, but are unlikely to fully capture how speciation and hybridization proceed in natural systems. In the proposed project, the researchers investigate the genetic basis of reproductive isolation between Indigo (Passerina cyanea) and Lazuli (P. amoena) buntings (Aves: Cardinalidae), which form a hybrid zone where their breeding ranges overlap. Preliminary data suggest that different genetic loci (mitochondrial, nuclear autosomal, nuclear Z-linked) exhibit differential introgression across the hybrid zone and implicate the Z-chromosome as having a relatively large impact on avian speciation. Here, patterns of genetic introgression of multiple Z-linked loci will be combined with theoretical predictions to test hypotheses aimed at identifying genes contributing to reproductive isolation between these species.Beyond the impact the research will have on our understanding of the evolution of reproductive isolation between closely related species, the data collected will also allow for assessments of range expansion in P. cyanea. Observational data suggests the breeding range of P. cyanea is expanding westward, perhaps at the expense of P. amoena, such that an accurate knowledge of the patterns of hybridization between them may be important for conservation purposes.

模型生物之间的杂交研究对于我们对新物种形成的理解非常重要，但不可能完全捕获自然系统中的物种形成和杂交的方式。在拟议的项目中，研究人员研究了靛蓝（Passerina cyanea）和Lazuli（P. amoena）Buntings（Aves：Cardinalidae）之间生殖隔离的遗传基础，这些杂种形成了它们的繁殖范围重叠的混合区域。初步数据表明，不同的遗传基因座（线粒体，核常染色体，核Z连锁）在整个杂种区显示出不同的渗入，并暗示Z染色体对鸟类物种的影响相对较大。 Here, patterns of genetic introgression of multiple Z-linked loci will be combined with theoretical predictions to test hypotheses aimed at identifying genes contributing to reproductive isolation between these species.Beyond the impact the research will have on our understanding of the evolution of reproductive isolation between closely related species, the data collected will also allow for assessments of range expansion in P. cyanea.观察数据表明，蓝藻的繁殖范围正在向西扩展，也许是以Amoena为代价的，因此对它们之间杂交模式的准确了解对于保护目的可能很重要。