气候变化领域集成服务门户(CCPortal): The genome sequence and demographic history of Przewalskia tangutica (Solanaceae), an endangered alpine plant on the Qinghai-Tibet Plateau

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DOI	10.1093/dnares/dsad005
	The genome sequence and demographic history of Przewalskia tangutica (Solanaceae), an endangered alpine plant on the Qinghai-Tibet Plateau
	Wu, Ying; Yang, Jiao; Yang, Yongzhi; Liu, Jianquan
发表日期	2023
ISSN	1340-2838
EISSN	1756-1663
卷号	30 期号:2
英文摘要	To adapt to high-altitude habitats, many alpine plants develop self-compatible breeding systems from outcrossing. The genetic bases for this shift and the resulting demographic consequences remain largely unexplored. Here, we present a high-quality, chromosome-level genome assembly of the monotypic and endangered alpine perennial Przewalskia tangutica (Solanaceae) occurring on the Qinghai-Tibet Plateau (QTP). Our assembled genome is approximately 3 Gb, with a contig N50 size of 17 Mb, and we identified one lineage-specific whole-genome duplication. We found that the gametophytic self-incompatibility (GSI) syntenic locus to the other obligate outcrossing Solanaceae species was broken by the inserted the long terminal repeats, and changes in the flower-specific expression of the homologous genes, and the linked GSI genes in this species. Such changes may have led to its self-compatibility. We identified three deeply diverged lineages in the central distribution of this species, and the gene flow between them was weak but continuous. All three lineages diverged and decreased their population sizes since the largest glaciations occurred in the QTP approximately 720-500 thousand years ago. In addition, we identified one obvious hybrid population between two lineages, suggesting that genetic exchanges between and within lineages still occur. Our results provide insights into evolutionary adaptation through facultative self-pollination and demographic consequences of this alpine rare species in arid habitats.
关键词	Przewalskia tangutica selfing demographic history hybridization Qinghai-Tibet Plateau
英文关键词	REPRODUCTIVE ASSURANCE; PHYLOGENETIC ANALYSIS; SELF-INCOMPATIBILITY; READ ALIGNMENT; WEB SERVER; TOOL; ANNOTATION; GENE; IDENTIFICATION; POLYPLOIDY
WOS研究方向	Genetics & Heredity
WOS记录号	WOS:000972913300001
来源期刊	DNA RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282808
作者单位	Lanzhou University
推荐引用方式 GB/T 7714	Wu, Ying,Yang, Jiao,Yang, Yongzhi,et al. The genome sequence and demographic history of Przewalskia tangutica (Solanaceae), an endangered alpine plant on the Qinghai-Tibet Plateau[J],2023,30(2).
APA	Wu, Ying,Yang, Jiao,Yang, Yongzhi,&Liu, Jianquan.(2023).The genome sequence and demographic history of Przewalskia tangutica (Solanaceae), an endangered alpine plant on the Qinghai-Tibet Plateau.DNA RESEARCH,30(2).
MLA	Wu, Ying,et al."The genome sequence and demographic history of Przewalskia tangutica (Solanaceae), an endangered alpine plant on the Qinghai-Tibet Plateau".DNA RESEARCH 30.2(2023).