干旱区生态环境知识资源中心(Arid): Correlations among chromosome numbers, nuclear DNA contents and climatic variables of South American Cactaceae in a phylogenetic context

Arid

DOI	10.1093/biolinnean/blad070
	Correlations among chromosome numbers, nuclear DNA contents and climatic variables of South American Cactaceae in a phylogenetic context
	Las Penas, Maria Laura; Bauk, Karen; Rossi, Nicola; Bernardello, Gabriel
通讯作者	Peñas, MLL
来源期刊	BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
ISSN	0024-4066
EISSN	1095-8312
出版年	2024
卷号	141 期号:1 页码:87-101
英文摘要	Cactaceae are American members of arid and semi-arid regions and are also present in tropical forests and temperate climates. The taxonomy is complex owing to large morphological variability, and polyploidy is a significant mechanism in cactus speciation associated with geographical and environmental range expansions. In South America, Cactaceae have a wide distributional range and provide an informative model in which to examine the correlation between ploidy levels and genome sizes with geographical and bioclimatic variables. We tested whether ploidy levels and DNA contents are related to elevation and the 19 WorldClim variables, and we mapped chromosome numbers and amounts of DNA on a molecular phylogeny to interpret their evolution. We performed Pearson correlation tests between the response variables and each climatic variable and used a multivariate analysis to assess the pattern of variation among variables and chromosome numbers. Our data suggest that polyploidy had independent origins within each subfamily. Chromosome numbers were related to variables associated with temperature, whereas DNA contents were related mostly to precipitation. A negative correlation was observed between the amount of DNA in one chromosome set and the increase in the ploidy level. Based on the results, the small genome can be considered ecologically important as an adaptation to higher temperatures and droughts.
英文关键词	character mapping chromosome evolution elevation environmental variables precipitation temperature
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:001048722600001
WOS关键词	GENOME SIZE ; KARYOTYPE ANALYSIS ; PLANT DIVERSITY ; EVOLUTION ; POLYPLOIDY ; COUNTS ; HETEROCHROMATIN ; CACTUS ; RDNA ; HAAGEOCEREUS
WOS类目	Evolutionary Biology
WOS研究方向	Evolutionary Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403021
推荐引用方式 GB/T 7714	Las Penas, Maria Laura,Bauk, Karen,Rossi, Nicola,et al. Correlations among chromosome numbers, nuclear DNA contents and climatic variables of South American Cactaceae in a phylogenetic context[J],2024,141(1):87-101.
APA	Las Penas, Maria Laura,Bauk, Karen,Rossi, Nicola,&Bernardello, Gabriel.(2024).Correlations among chromosome numbers, nuclear DNA contents and climatic variables of South American Cactaceae in a phylogenetic context.BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY,141(1),87-101.
MLA	Las Penas, Maria Laura,et al."Correlations among chromosome numbers, nuclear DNA contents and climatic variables of South American Cactaceae in a phylogenetic context".BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY 141.1(2024):87-101.