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| Population Genetic Structure of Black Grouse (Tetrao tetrix) : From a Large to a Fine Scale Perspective | |
| Corrales Duque;Carolina | |
| 出版年 | 2011 |
| 学位授予单位 | Uppsala universitet, Institutionen för ekologi och genetik, Uppsala universitet, Populationsbiologi och naturvårdsbiologi, Uppsala : Acta Universitatis Upsaliensis |
| 英文摘要 | Black grouse (Tetrao tetrix) is a bird species with a lek mating system found in the Palearctic boreal taiga. It is assumed that it has a continuous distribution along Scandinavia and Siberia, whereas in Central Europe it has declined during the last decades. The primary objective of this thesis was to obtain a deeper understanding of the history, systematic classification and the genetic structure of black grouse on different geographical scales using microsatellites and control region mtDNA sequences (CR). I determined how much the mating system, habitat fragmentation and historical population processes have influenced the partitioning of genetic diversity in this species. Phylogeographical results are consistent with a demographic population expansion, and the patterns of postglacial dispersal suggest that a glacial refugium was located somewhere in central Asia, and from there black grouse spread out to Europe following the retreat of glacial ice sheets. I suggest that the two European black grouse subspecies, T. t. Tetrix and T. t. britannicus correspond to only one subspecies: T. t. tetrix, and that this lineage has diverged from T.t. viridanus, a subspecies found in Kazakhstan. The British population is significantly divergent from the remaining Eurasian samples for microsatellites but it is not for mtDNA. Therefore, they should regard as a separate Management Unit and not as a subspecies. Furthermore, British black grouse occur in three independent genetic units, corresponding to Wales, northern England/southern Scotland and northern Scotland. There was also genetic structure within Sweden. Habitat fragmentation is the main cause of population genetic structure in southern Swedish black grouse. In contrast, low levels of genetic differentiation and high connectivity were found in northern Sweden due to female-biased dispersal. On a finer geographical scale, I found genetic differences between leks due to a mixture of related and unrelated individuals within leks. However, mean relatedness values hardly differed from zero. Some leks were similar to one another and I interpret this as a result of variation in local reproductive success and philopatry. These factors would cause genetic structuring but this by itself would not reveal that kin selection is operating within black grouse leks. |
| 英文关键词 | Black grouse Control region Demographic expansion Kin selection Lek Microsatellites Non-invasive sampling Postglacial colonisation Philopatry Phylogeography Sex-biased dispersal Spatial genetics Subspecies Suture zone Refugia Biology Biologi Systematics and phylogenetics Systematik och fylogeni |
| 语种 | 英语 |
| URL | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-150117 |
| 来源机构 | Uppsala University |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/245713 |
| 推荐引用方式 GB/T 7714 | Corrales Duque;Carolina. Population Genetic Structure of Black Grouse (Tetrao tetrix) : From a Large to a Fine Scale Perspective[D]. Uppsala universitet, Institutionen för ekologi och genetik, Uppsala universitet, Populationsbiologi och naturvårdsbiologi, Uppsala : Acta Universitatis Upsaliensis,2011. |
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