齿肋赤藓种群的遗传多样性与迁移扩散规律研究

This project aims to use the theory and method of ecology ,molecular ecology and Phylogeography, using molecular markers, namely DNA sequencing of chloroplast and microsatellite markers to study the population genetic diversity and Phylogeography relationship among populations of Syntrichia caninervis which distribute in the world, as well as to find out its spread route in the distribution region.On this basis, we try to explain the distribution pattern and the mechanism to maintain the genetic diversity of the species. This research will help us to understand the formation of communities and the mechanism to maintain the genetic diversity of temperate plant communities in East Asia, and will provide important theoretical reference for conservation biology and has important significance for investigating the response of biological group to geological events and climate change.

本研究以齿肋赤藓种群作为研究对象，拟运用生态学、分子生态学以及亲缘地理学的理论与方法，研究齿肋赤藓种群在分布区内的遗传多样性、遗传结构与种群扩散规律，初步揭示齿肋赤藓种群遗传分化产生的原因，该种群的迁移扩散格局，进而解释齿肋赤藓种群遗传多样性维持的机制。该研究将对了解齿肋赤藓种群植物进化历史及制定齿肋赤藓种群的保护策略方面提供一定的理论依据。

齿肋赤藓属于丛藓科赤藓属，是典型的耐旱藓类植物。其叶片仅具单层细胞，却能适应极端高低温、干燥、强光照、高海拔等恶劣生境，在我国青藏高原和西北干旱区具有广泛分布。青藏高原的快速隆起及其引起的西北地区干旱化，显著影响了本地区植物的分布格局和群落结构，并逐渐成为了亲缘地理学研究的热点地区之一。.本项目以齿肋赤藓为研究对象，以齿肋赤藓种群作为研究对象，运用了生态学、分子生态学以及亲缘地理学的理论与方法，研究齿肋赤藓种群在分布区内的遗传多样性、遗传结构与种群扩散规律，初步揭示了齿肋赤藓种群遗传分化产生的原因，该种群的迁移扩散格局，进而解释了齿肋赤藓种群遗传多样性维持的机制。该研究将对了解齿肋赤藓种群植物进化历史及制定齿肋赤藓种群的保护策略方面提供了一定的理论依据。