scholarly journals Allopatric divergence and hybridization within Cupressus chengiana (Cupressaceae), a threatened conifer in the northern Hengduan Mountains of western China

2020 ◽  
Vol 29 (7) ◽  
pp. 1250-1266 ◽  
Author(s):  
Jialiang Li ◽  
Richard I. Milne ◽  
Dafu Ru ◽  
Jibin Miao ◽  
Wenjing Tao ◽  
...  
Keyword(s):  
Western China ◽  
Hengduan Mountains ◽  
Allopatric Divergence ◽  
Cupressus Chengiana

Tongoloa tagongensis (Apiaceae), a new species from the Hengduan Mountains, China

Phytotaxa ◽  
2020 ◽  
Vol 461 (1) ◽  
pp. 12-20
Author(s):  
LING-JIAN GUI ◽  
SHENG-BIN JIA ◽  
XIAN-LIN GUO ◽  
MEGAN PRICE ◽  
SONG-DONG ZHOU ◽  
...  
Keyword(s):  
New Species ◽  
Western China ◽  
Hengduan Mountains ◽  
A New Species

Tongoloa tagongensis (Apiaceae), is proposed as a new species from the Hengduan Mountains in Sichuan, western China. It is most similar to T. elata, but the new species’ roots are short conic to tuberous, lower leaves 2–3-ternate/pinnate, rays 4–11, and ribs more obvious. Description and illustrations are provided.

scholarly journals Westwards and northwards dispersal ofTriosteum himalayanum(Caprifoliaceae) from the Hengduan Mountains region based on chloroplast DNA phylogeography

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4748 ◽  
Author(s):  
Hai-rui Liu ◽  
Qing-bo Gao ◽  
Fa-qi Zhang ◽  
Gulzar Khan ◽  
Shi-long Chen
Keyword(s):  
Chloroplast Dna ◽  
Phylogeographic Structure ◽  
Herbaceous Plant ◽  
Hengduan Mountains ◽  
Mountain Areas ◽  
High Genetic Diversity ◽  
Climatic Oscillations ◽  
The North ◽  
Heterogeneous Habitats ◽  
Allopatric Divergence

The varying topography and environment that resulted from paleoorogeny and climate fluctuations of the Himalaya–Hengduan Mountains (HHM) areas had a considerable impact on the evolution of biota during the Quaternary. To understand the phylogeographic pattern and historical dynamics ofTriosteum himalayanum(Caprifoliaceae), we sequenced three chloroplast DNA fragments (rbcL-accD,rps15-ycf1, andtrnH-psbA) from 238 individuals representing 20 populations. Nineteen haplotypes (H1–H19) were identified based on 23 single-site mutations and eight indels. Most haplotypes were restricted to a single population or neighboring populations. Analysis of molecular variance revealed that variations among populations were much higher than that within populations for the overall gene pool, as well as for the East Himalayan group (EH group) and the North Hengduan group (NHM group), but not for the Hengduan Mountains group (HM group). Ecoregions representing relatively high genetic diversity or high frequencies of private haplotypes were discovered, suggesting that this alpine herbaceous plant underwent enhanced allopatric divergence in isolated and fragmented locations during the Quaternary glaciations. The current phylogeographic structure ofT. himalayanummight be due to heterogeneous habitats and Quaternary climatic oscillations. Based on the phylogeographic structure ofT. himalayanumpopulations, the phylogenetic relationship of identified haplotypes and palaeodistributional reconstruction, we postulated both westwards and northwards expansion from the HM group for this species. The westwards dispersal corridor could be long, narrow mountain areas and/or the Yarlung Zangbo Valley, while the northwards movement path could be south–north oriented mountains and low-elevation valleys.

TBE in China

2020 ◽  
Keyword(s):  
Western China ◽  
Ixodes Persulcatus ◽  
West China ◽  
North West ◽  
Haemaphysalis Concinna ◽  
Viral Subtype ◽  
Japanese Military ◽  
Natural Foci ◽  
Far Eastern ◽  
The Brain

The first TBE patients in China were reported in 1943, and the TBEV was isolated from the brain tissues of 2 patients in 1944 by Japanese military scientists,1 and from patients and ticks (Ixodes persulcatus and Haemaphysalis concinna) in 1952 by Chinese researchers.2 The Far Eastern viral subtype (TBEV-FE) is the endemic subtype that has been isolated from all 3 known natural foci (northeastern China, western China, and southwestern China).14 Recently a new “Himalayan subtype” of the TBEV (TBEV-HIM) was isolated from wild rodent Marmoata himalayana in the Qinghai-Tibet Plateau15. The main vector of the TBEV in China is I. persulcatus.3 One recent report suggests that the TBEV-SIB is prevalent in the Uygur region (North West China)13 but epidemiological modelling indicates that the TBEV may occur even widely all over China (Figure 3).4 Likely, the disease is often missed by clinicians due to a lack of the availability of specific diagnostic assays16.

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