Genome size in species of the South American genus Chrysolaena (Vernonieae: Asteraceae) and its relationship with cytogenetic and environmental characteristics
Genome size is a species level that often allows taxon delimitation, influencesgenetic diversity, and can be related to morphological, ecological, and distribution characteristics.Chrysolaena H. Rob. (Vernonieae, Asteraceae) is a South American genus, highly cytogeneticallydiverse, exhibiting large...
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| Autores principales: | , , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Instituto de Botánica del Nordeste
2026
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| Materias: | |
| Acceso en línea: | https://revistas.unne.edu.ar/index.php/bon/article/view/9126 |
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| Sumario: | Genome size is a species level that often allows taxon delimitation, influencesgenetic diversity, and can be related to morphological, ecological, and distribution characteristics.Chrysolaena H. Rob. (Vernonieae, Asteraceae) is a South American genus, highly cytogeneticallydiverse, exhibiting large interspecific and intraspecific chromosomal variation. In this work, thegenome size (2C value) of Chrysolaena species was determined to assess variation amongthe different chromosome numbers present in the species, to examine the relationship betweengenome size and chromosome numbers, latitude, and environmental variables, and expandthe database for Asteraceae. Linear regression results showed that the 2C value is related tochromosome number. However, the correlation with latitude and environmental variables is verylow. Evolutionary trends in genome size include both increases and decreases, and polyploidyis believed to be the main mechanism generating increases in genomic DNA content. Theresults of this study constitute an important contribution to the knowledge of genome size in arepresentative genus of the Asteraceae family in South America. |
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