Genome size variation and polyploidy prevalence in the genus Eragrostis are associated with the global dispersal in arid area

doi:10.3389/fpls.2023.1066925

KIB OpenIR

	Genome size variation and polyploidy prevalence in the genus Eragrostis are associated with the global dispersal in arid area
	Hutang,Ge-Ran; Tong,Yan; Zhu,Xun-Ge; Gao,Li-Zhi
	2023
发表期刊	FRONTIERS IN PLANT SCIENCE
卷号	14 页码:1066925
摘要	BackgroundBiologists have long debated the drivers of the genome size evolution and variation ever since Darwin. Assumptions for the adaptive or maladaptive consequences of the associations between genome sizes and environmental factors have been proposed, but the significance of these hypotheses remains controversial. Eragrostis is a large genus in the grass family and is often used as crop or forage during the dry seasons. The wide range and complex ploidy levels make Eragrostis an excellent model for investigating how the genome size variation and evolution is associated with environmental factors and how these changes can ben interpreted. MethodsWe reconstructed the Eragrostis phylogeny and estimated genome sizes through flow cytometric analyses. Phylogenetic comparative analyses were performed to explore how genome size variation and evolution is related to their climatic niches and geographical ranges. The genome size evolution and environmental factors were examined using different models to study the phylogenetic signal, mode and tempo throughout evolutionary history. ResultsOur results support the monophyly of Eragrostis. The genome sizes in Eragrostis ranged from similar to 0.66 pg to similar to 3.80 pg. We found that a moderate phylogenetic conservatism existed in terms of the genome sizes but was absent from environmental factors. In addition, phylogeny-based associations revealed close correlations between genome sizes and precipitation-related variables, indicating that the genome size variation mainly caused by polyploidization may have evolved as an adaptation to various environments in the genus Eragrostis. ConclusionThis is the first study to take a global perspective on the genome size variation and evolution in the genus Eragrostis. Our results suggest that the adaptation and conservatism are manifested in the genome size variation, allowing the arid species of Eragrostis to spread the xeric area throughout the world.
关键词	genome size phylogeny Eragrostis adaptation environmental factors GRASS SUBFAMILY CHLORIDOIDEAE NUCLEAR-DNA CONTENT TEF ZUCC TROTTER CHROMOSOME-NUMBERS PHYLOGENETIC SIGNAL NICHE CONSERVATISM MOLECULAR PHYLOGENY DROUGHT TOLERANCE MODEL SELECTION SOUTH-AFRICAN
学科领域	Plant Sciences
DOI	10.3389/fpls.2023.1066925
WOS记录号	WOS:000952136300001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/74970
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Hutang,Ge-Ran,Tong,Yan,Zhu,Xun-Ge,et al. Genome size variation and polyploidy prevalence in the genus Eragrostis are associated with the global dispersal in arid area[J]. FRONTIERS IN PLANT SCIENCE,2023,14:1066925.
APA	Hutang,Ge-Ran,Tong,Yan,Zhu,Xun-Ge,&Gao,Li-Zhi.(2023).Genome size variation and polyploidy prevalence in the genus Eragrostis are associated with the global dispersal in arid area.FRONTIERS IN PLANT SCIENCE,14,1066925.
MLA	Hutang,Ge-Ran,et al."Genome size variation and polyploidy prevalence in the genus Eragrostis are associated with the global dispersal in arid area".FRONTIERS IN PLANT SCIENCE 14(2023):1066925.

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