气候变化领域集成服务门户(CCPortal): Comparative plastome analysis and taxonomic classification of snow lotus species (Saussurea, Asteraceae) in Central Asia and Southern Siberia

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DOI	10.1007/s10142-024-01309-y
	Comparative plastome analysis and taxonomic classification of snow lotus species (Saussurea, Asteraceae) in Central Asia and Southern Siberia
	Nyamgerel, Nudkhuu; Baasanmunkh, Shukherdorj; Oyuntsetseg, Batlai; Tsegmed, Zagarjav; Bayarmaa, Gun-Aajav; Lazkov, Georgy; Pyak, Elizaveta; Gil, Hee-Young; Park, Inkyu; Choi, Hyeok Jae
发表日期	2024
ISSN	1438-793X
EISSN	1438-7948
起始页码	24
结束页码	2
卷号	24 期号:2
英文摘要	Four species of Saussurea, namely S. involucrata, S. orgaadayi, S. bogedaensis, and S. dorogostaiskii, are known as the snow lotus, which are used as traditional medicines in China (Xinjiang), Kyrgyzstan, Mongolia, and Russia (Southern Siberia). These species are threatened globally, because of illegal harvesting and climate change. Furthermore, the taxonomic classification and identification of these threatened species remain unclear owing to limited research. The misidentification of medicinal species can sometimes be harmful to health. Therefore, the phylogenetic and genomic features of these species need to be confirmed. In this study, we sequenced five complete chloroplast genomes and seven nuclear ITS regions of four snow lotus species and other Saussurea species. We further explored their genetic variety, selective pressure at the sequence level, and phylogenetic relationships using the chloroplast genome, nuclear partial DNA sequences, and morphological features. Plastome of the snow lotus species has a conserved structure and gene content similar to most Saussurea species. Two intergenic regions (ndhJ-ndhK and ndhD-psaC) show significantly high diversity among chloroplast regions. Thus, ITS and these markers are suitable for identifying snow lotus species. In addition, we characterized 43 simple sequence repeats that may be useful in future population genetic studies. Analysis of the selection signatures identified three genes (rpoA, ndhB, and ycf2) that underwent positive selection. These genes may play important roles in the adaptation of the snow lotus species to alpine environments. S. dorogostaiskii is close to S. baicalensis and exhibits slightly different adaptation from others. The taxonomic position of the snow lotus species, confirmed by morphological and molecular evidence, is as follows: (i) S. involucrata has been excluded from the Mongolian flora due to misidentification as S. orgaadayi or S. bogedaensis for a long time; (ii) S. dorogostaiskii belongs to section Pycnocephala subgenus Saussurea, whereas other the snow lotus species belong to section Amphilaena subgenus Amphilaena; and (iii) S. krasnoborovii is synonymous of S. dorogostaiskii. This study clarified the speciation and lineage diversification of the snow lotus species in Central Asia and Southern Siberia.
英文关键词	Saussurea; Amphilaena; Snow lotus; Plastome; Phylogenomics
语种	英语
WOS研究方向	Genetics & Heredity
WOS类目	Genetics & Heredity
WOS记录号	WOS:001172493300001
来源期刊	FUNCTIONAL & INTEGRATIVE GENOMICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304284
作者单位	Changwon National University; National University of Mongolia; National Academy of Sciences of the Kyrgyz Republic (NAS KR); Tomsk State University; Korea National Arboretum
推荐引用方式 GB/T 7714	Nyamgerel, Nudkhuu,Baasanmunkh, Shukherdorj,Oyuntsetseg, Batlai,et al. Comparative plastome analysis and taxonomic classification of snow lotus species (Saussurea, Asteraceae) in Central Asia and Southern Siberia[J],2024,24(2).
APA	Nyamgerel, Nudkhuu.,Baasanmunkh, Shukherdorj.,Oyuntsetseg, Batlai.,Tsegmed, Zagarjav.,Bayarmaa, Gun-Aajav.,...&Choi, Hyeok Jae.(2024).Comparative plastome analysis and taxonomic classification of snow lotus species (Saussurea, Asteraceae) in Central Asia and Southern Siberia.FUNCTIONAL & INTEGRATIVE GENOMICS,24(2).
MLA	Nyamgerel, Nudkhuu,et al."Comparative plastome analysis and taxonomic classification of snow lotus species (Saussurea, Asteraceae) in Central Asia and Southern Siberia".FUNCTIONAL & INTEGRATIVE GENOMICS 24.2(2024).