The development relationship between small leaf groups of "air islands" (azalea white bead trees).

"Sky island" is used to indicate that the high-altitude habitats of organisms are divided or isolated by different mountains and are isolated in an island-like form, with high biodiversity in the region, rich in endemic, high-altitude migratory species and species, as well as radioactive evolutionary groups.
Its geological history, climate evolution and biological expansion methods are more complex, which provides an important place for exploring how climate and geography affect species distribution patterns and genetic diversity, while the spatial and relevant evolution patterns of their species also provide important biological evidence for the geomorphology and environmental evolution of mountain canyons.
The gaultheria L.ser.Trichophyllae, which grows in alpine meadows or thickets between 2,600 and 4,200 meters above sea level, is confined to the deep valley landscape of the Himalayan-Crossing Mountains, showing a very typical "air island"-like distribution pattern, which is ideal for the study of the genetic differentiation mechanism of "air islands" with different mountain ranges and different historical backgrounds.
Past studies have shown that this group is one of the single-line groups that have under been affected by the rapid uplinding of the Qinghai-Tibet Plateau, but systematic developmental analysis based on multi-gene fragments or by simply increasing gene fragments cannot clarify their inter-species kinship, and the genetic differentiation and species maintenance mechanisms of this group need to be studied in depth.
Research Group and Wang Hong Research Group of Kunming Plant Research Institute of the Chinese Academy of Sciences and Peter W. Fritsch, Professor of Texas Plant Research Institute, have been collaborating on this group for a long time and have obtained a series of research results.
recently, Zhang Mingying, Ph.D., and Lu Lu, an associate researcher in the research team, used second-generation sequencing techniques to sequence the yerote genome of 28 samples from all 19 species of small leaf groups.
5 sets of data, such as the full sequence of the yerelor genome, the sequence of coding area, the sequence of non-coding region, the sequence of large single copy area, the reverse repeat sequence, and the systematic development relationship of this group are analyzed by many methods.
results show that: 1) the systematic development tree based on the whole sequence of the serum genome, the sequence of non-coding regions and the sequence of large single-copy regions fully clarifies the interseth relationship between small leaf groups, and the relationship of species evolution has a high support rate. 2) Based on the developmental framework of the system, the evolutionary style of 10 key forms of small leaf groups is remodeled, which lays an important foundation for further species division and taxonomy revision, and the evolutionary trend of this group's habits is discussed based on the frequency of changes in nature. 3) Screening out rpl36_infA, trnF (GAA) _ndhJ and other 8 molecular sequence variation hot spots, each region is rich in the variation of 5% of the point of variation, for the subsethical study of this group, or the Himalayan-Crossing Mountain other radiation evolution group research provides an important molecular marker reference.
the study received from the National Natural Science Foundation of China (41671052,31100163), the National Key Basic Research and Development Program ("973" Program, 2014CB954100), and the Chinese Academy of Sciences Key Deployment Project (KSZD-EW-Z-011-01 Project-funded studies such as Plastid phylogenomics and adaptive evolution of Gaultheria series Trichophyllae (Ericaceae), a clade from the sky islands of the Himalaya-Hengduan Mountains, published online in the mainstream journal Ofecular Phylogenetics and Evolution of International Molecular Systems and Evolutionary Biology.
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