Los cromosomas meióticos de la rana arborícola Smilisca baudinii (Anura: Hylidae)

 

Saved in:
Bibliographic Details
Authors: Hernández-Guzmán, Javier, Arias-Rodriguez, Lenin, Rimber Indy, Jeane
Format: artículo original
Status:Versión publicada
Publication Date:2011
Description:The Mexican tree frog Smilisca baudinii, is a very common frog in Central America. In spite their importance to keep the eco-logical equilibrium of the rainforest, its biology and genetics are poorly known. In order to contribute with its biological knowledge, we described the typical meiotic karyotype based in standard cytogenetic protocols to specimens collected in Tabasco, Mexico. The study was centered in the analysis of 131 chromosome spreads at meiotic stage from two adults of the species (one female and one male). The metaphase analysis allowed the establishment of the modal haploid number of 1n=12 bivalent chromosomes. The chromosomic formulae from the haploid bivalent karyotype was integrated by 12 biarmed chromosomes characterized by twelve pairs of metacentric-submetacentric (msm) chromosomes. The meiotic counting gives the idea that diploid chromosome number is integrated by a complement of 2n=24 biarmed chromosomes. The presence of sex chromosomes from female and male meiotic spreads was not observed. Current results suggest that S. baudinii chromosome structure is well shared among Hylidae family and “B” chromosomes are particular structures that have very important evolutionary consequences in species diversification.
Country:Portal de Revistas UCR
Institution:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
Language:Español
OAI Identifier:oai:portal.ucr.ac.cr:article/3204
Online Access:https://revistas.ucr.ac.cr/index.php/rbt/article/view/3204
Keyword:Hylidae
Smilisca baudinii
cariotipo
cromosoma
meiosis
karyotype
chromosome