INVESTIGADORES
BALDO Juan Diego
artículos
Título:
A single origin for the widely distributed B chromosomes of the Gladiator frog Boana albopunctata
Autor/es:
FERRO JUAN MARTÍN; PRETTO GATTO, KALEB; NETTO FLAVIA; RESQUÍN, JUAN JOSÉ; COSTA, WILLIAM; MARTI, D. A.; LOURENÇO LUCIANA; BALDO DIEGO
Revista:
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2023
ISSN:
0024-4066
Resumen:
B chromosomes are supernumerary elements that show a wide taxonomic distribution among eukaryotes. Even though they are dispensable, they can acquire mechanisms to be overrepresented in the next generation and therefore avoid being eliminated. These elements were discovered in less than 2% of the karyotyped anurans. B chromosomes were described for Argentine and Brazilian populations of Boana albopunctata, a neotropical tree frog widely distributed in the central region of South America. We assessed the distribution of B chromosomes in this species via cytogenetic studies of 365 specimens from Argentina, Brazil, and Paraguay. We found that 101 individuals carried B chromosomes, with striking differences in their frequency of occurrence among localities. Our findings might be related to the evolutionary dynamics of these elements. Microdissection and chromosome painting experiments demonstrated sequence similarity between Bs from localities that are more than 1000 km apart, showing the most widely distributed B-chromosome system known for anurans. The B chromosome system of B. albopunctata may help fill the general knowledge gap for these elements in anurans compared to other vertebrates.