Genome size evolution and chromosome numbers of species of the cryptanthoid complex (Bromelioideae, Bromeliaceae) in a phylogenetic framework
| Autor: | Santelmo Vasconcelos, Georg Zizka, José Marcello Salabert de Campos, Jailson Gitaí, Ana Christina Brasileiro-Vidal, Ana Maria Benko-Iseppon, Elton M. C. Leme, Geyner Alves dos Santos Cruz, José Roseno De Mendonça Filho, Lyderson Facio Viccini |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine biology Phylogenetic tree Chromosome Bromeliaceae Plant Science biology.organism_classification 010603 evolutionary biology 01 natural sciences 03 medical and health sciences 030104 developmental biology Evolutionary biology Bromelioideae Genome size Ecology Evolution Behavior and Systematics |
| Zdroj: | Botanical Journal of the Linnean Society. 192:887-899 |
| ISSN: | 1095-8339 0024-4074 |
| DOI: | 10.1093/botlinnean/boz103 |
| Popis: | We describe the chromosome numbers and genome sizes of species of the cryptanthoid complex of Bromeliaceae in a phylogenetic framework and their relationship with habitat preferences. The 2C DNA contents varied 2.13-fold among species, ranging from 0.76 to 1.66 pg. A significant difference in DNA content was found among Cryptanthus, Hoplocryptanthus and Rokautskyia. Moreover, species from campos rupestres and the Atlantic Forest had lower and higher genome size values, respectively. The smaller genome sizes of Hoplocryptanthus spp. from campos rupestres may be related with the large genome constraint. The species show a highly conserved ploidy (with 2n = 32 and 34), although the genome sizes varied considerably. The observed variation in chromosome numbers seems to be influenced by dysploidy, but additional investigations are needed. Our study demonstrates that the genome size variation in the cryptanthoid complex species is not strictly related to the phylogenetic relationships and has probably been influenced by different evolutionary processes. |
| Databáze: | OpenAIRE |
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