Publications by authors named "Ana Luisa Arantes Chaves"
Cryptangieae has recently been revised based on morphology and molecular phylogeny, but cytogenetic data is still scarce. We conducted this study with the aim of investigating the occurrence of holocentric chromosomes and pseudomonads, as well as understanding the mode of chromosomal evolution in the tribe. We performed analyses of meiotic behavior, chromosome counts, and reconstruction of the ancestral state for the haploid number.
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- Polyploidy is the primary factor causing differences in chromosome numbers within the Cynodon genus, leading to challenges in defining taxonomic boundaries and genomic similarities among species.
- This study used genomic in situ hybridization (GISH) to analyze the genomic makeup of both diploid and polyploid Cynodon species, while also exploring the presence of unreduced gametes in diploid C. dactylon pollen grains.
- The authors propose a genomic nomenclature for various Cynodon species and outline an evolutionary model suggesting potential hybridization events based on their findings and prior research.
Festuca L. has more than 600 perennial species described, which makes it the largest genus within the family Poaceae. In Brazil, only two native species of Festuca have been described, for which cytogenetic studies need to be strengthened: Festuca ulochaeta and Festuca fimbriata.
View Article and Find Full Text PDFCynodon dactylon is characterized by taxonomic and systematic complexity, and polyploidy is one of the factors responsible for its genetic and morphological diversity. The aim of the present study was to compare karyotypes of C. dactylon cytotypes based on fluorescent banding and nuclear DNA content.
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