The scientific research of Xianhu Botanical Garden has made a major breakthrough!Genomics research for the first time rebuilding the evolution of moss plants

Moss is a door in the plant world. It belongs to one of the three main branches of moss plants (moss, moss, and horn moss). The origin history can be traced back 400 million years ago. As an ancient plant group, the diversity of moss plants is very rich. At present, there are more than 7,300 categories in the world, which belongs to 15 meters, 87 families, and more than 300 genus. Shenzhen Xianhu Botanical Garden Research Team and collaborators used the transcription group data to rebuild the moss -level skeleton system. On September 8th, the relevant results were published online in the international journal "Annals of Botany".

Moss of moss plants. Interviewed units confession

In recent years, with the development of high -throughput sequencing technology, the development of genomics of plant system has achieved rapid development, and the transcriptional data has been widely used in the development of genomics of plant system. The transcription group is the expression map of the genome, with a large amount of data information and high sequencing efficiency. For group groups such as moss plants with large variations, the use of transcription group data has a great advantage. Researchers sampled 55 transcription data of moss, covering 14 of 15 of the fur of the moss, and built 1480 single copy nuclear gene matrix. Supported system development trees.

The analysis results show that Tao's moss and nude moss gathered together, which are sisters of all other moss; pots of pot moss, sac -fruit moss, semi -moon moss, and land money gathers are complex leaf -shaped bodies Branch; subsequent categories of categories of streams, fork mossya, and leaf moss Yagang divided in turn. The form of parallel exists. For the system location of the long -term controversy, the transcription group data strongly supports it to gather with the moss with the moss, and then form a sister group relationship with the leaf moss.

Although the system relationship of moss skeleton has received high support, its deep system relationship still has a wide range of conflicts between single nuclear genes. In addition, there is also a conflict signal between the cytotor genome data and the nuclear genetic data, suggesting that there may be ancient hybrid events in the process of evolution, and the phenomenon of incomplete spectrum sorting in the genetic evolution process. The previous research results of the Thousand Protection Proposal Plan believe that the ancestors of the leaf moss gangs may have a full genome copy, and this conclusion has not been supported by this study. Moss is a rare branch of land plants that have not occurred in its deep evolution. The reasons for this phenomenon and the significance behind it deserve further inquiry.

The first author of the paper was Dong Shanshan, an associate researcher at the key laboratory of the South Asian Tropical Plant Diversity of Shenzhen Xianhu Botanical Garden, and Liu Yang, a researcher. Zhang Li, a researcher at the Xianhu Botanical Garden, jointly trained Yu Jin, a graduate student at the Shenzhen Huada Life Sciences Research Institute, and Bernard Goffinet, a professor at the University of Connecticu, completed the work. The research is also supported by the Shenzhen Municipal Urban Management and Law Enforcement Bureau's scientific research special fund.

Shenzhen Evening News reporter Yixiao Hong Xuejue reporter Wei Yuchen

- END -